Public school · Pomona Unified · Pomona, California

Diamond Ranch High — Rating & test scores

Pomona · 9–12 · 1,542 students (2024–25)

100 Diamond Ranch Drive, 91766diamondranch.pusd.org ↗(909) 397-4715

50thpercentileSolid

The dots are California’s 1,498 scored public high schools, placed by Scope Score on spring 2025 tests. Why not spring 2026? High school scores include graduation and college-readiness records, which the state publishes a year after the tests. How it’s built →

Scope Score

Weighted composite · 2024–25
A weighted mix of seven measures.

See this school’s score factors ↓

Diamond Ranchhigher than 50 of the 100 California dots

California’s public high schools · 1 dot = 1 in 100

Needs Support25 in 100Developing25 in 100Solid25 in 100Strong25 in 100

Diamond Ranchhigher than 50 of the 100 California dots

California’s public high schools · 1 dot = 1 in 100

Needs Support25 in 100Developing25 in 100Solid25 in 100Strong25 in 100

Diamond Ranchhigher than 50 of the 100 California dots

California’s public high schools · 1 dot = 1 in 100

Needs Support25 in 100Developing25 in 100Solid25 in 100Strong25 in 100

In 2024–25, 96% of the class graduated in four years (338 of 353); across California, 89%.

Source

Source: CDE four-year adjusted cohort graduation rate (ACGR), 2024–25
Students: students who started 9th grade together: 353
Comparison: California: graduates divided by students who started 9th grade together, across 2,281 public schools’ rows (our combination, not CDE’s published state rate; 432,702 of 487,177).

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Campus map · © OpenStreetMap

Drawn from OpenStreetMap, with building heights from LA County. Volunteers map it, so a new building may be missing.

A picture of the campus, not an attendance boundary or a rating.

Schools maintain a closed campus policy. For students’ safety, visitors may enter a campus only with the school’s official permission; this drawing implies no permission to enter.

In grade 11, spring 2026, 68% scored Proficient or Advanced in English (reading and writing), against 57% across California.

From spring 2026, the state calls its top two levels “Proficient or Advanced” (formerly “Met or Exceeded”).

Sources

The sentence above: California’s state tests (CAASPP), California Department of Education, spring 2026. All students tested in grade 11. California: CDE’s grade 11 rows for the whole state combined, weighted by students tested (our calculation; 414,559 in English tested).

Common questions

How do I get in?

Ask Pomona Unified which school serves your address. Evidence ↓

Is Diamond Ranch a good high school?

Diamond Ranch High scores higher than 50 in 100 of California’s 1,498 scored public high schools: 50th percentile, Solid, spring 2025. Evidence ↓

How often do students miss school or get suspended?

In 2025–26, 27 in 100 students missed 10% or more of school days, against 28 in 100 at the average Pomona Unified high school. 0.6% of students (9 of 1,571) were suspended at least once in 2025–26, against 2.9% at the average California high school. Evidence ↓

How does math compare with English?

In grade 11, spring 2026, math trails English by 37 percentage points in the share who scored Proficient or Advanced, against 25 points across California. Evidence ↓

How do kids like mine do here?

In spring 2026, 65% of low-income students in grade 11 at Diamond Ranch High in Pomona scored Proficient or Advanced in English, against 49% for the same group across California. Evidence ↓

What could my child study here?

The College Board approved this school to teach 21 AP courses in 6 subjects for 2025–26.

93 students took a college course for credit in 2023–24, by the federal Civil Rights Data Collection

Evidence ↓

Where do students go after finishing high school here?

80% of the class of 2023 enrolled in college within 12 months, by CDE’s college-going records. Evidence ↓

What should I ask on a visit?

The questions drawn from this page are under Next steps, ready to copy. Evidence ↓

Academic achievement

How did students here do on state tests?

Well above California in English; near it in math.

State tests (CAASPP), grade 11, spring 2026

In grade 11, spring 2026, 68% scored Proficient or Advanced in English and 31% in math, against 57% and 32% across California.

Source

Source: California’s state tests (CAASPP), California Department of Education, spring 2026
Students: all students tested in grade 11: 333
Comparison: California: CDE’s grade 11 rows for the whole state combined, weighted by students tested (our calculation; 414,559 in English, 413,523 in math tested). The comparisons use the same grade and year.

AdvancedProficientBelow the standard

English

Grade 11 · spring 2026 · 333 tested

Advanced: 24%
Proficient: 44%
Below the standard: 32%

This school68%

California57%

Pomona Unified54%

68% Proficient or Advanced in grade 11.

Math

Grade 11 · spring 2026 · 333 tested

Advanced: 13%
Proficient: 18%
Below the standard: 69%

This school31%

California32%

Pomona Unified27%

31% Proficient or Advanced in grade 11.

New to these scores? Read CAASPP scores explained: how to read your child’s report →

How does math compare with English?

In grade 11, spring 2026, math trails English by 37 percentage points in the share who scored Proficient or Advanced, against 25 points across California. The grade 11 cards above give each subject’s share.

Have results changed?

English results were similar to 2025; math results were higher. English stayed at 68% and math went from 26% to 31%.

English · top two levels · grade 11

202568%380 tested

→

202668%333 tested

This school

California, same grades57% → 57%2025 → 2026 · 432,651 → 414,559 tested

Math · top two levels · grade 11

202526%380 tested

→

202631%333 tested

This school

California, same grades30% → 32%2025 → 2026 · 431,903 → 413,523 tested

Each year is a different group of students.

Ask: What extra help do students who are behind get, and how do you know it’s working?

All four levelsThe state’s test levels Advanced, Proficient, the Developing level (formerly Nearly met) and Minimal, with tested counts

Share of students tested at each level, spring 2026
Students	Advanced	Proficient	Developing level	Minimal	Tested
English, grade 11 · This school	24%	44%	19%	13%	333
English, grade 11 · California	27%	30%	21%	22%	414,559
English, grade 11 · Pomona Unified	21%	33%	19%	27%	1,324
Math, grade 11 · This school	13%	18%	21%	48%	333
Math, grade 11 · California	16%	16%	20%	48%	413,523
Math, grade 11 · Pomona Unified	13%	14%	17%	56%	1,325

Below the standard combines the state’s Developing and Minimal levels, its two lowest. Data source: California Department of Education, spring 2026. The state comparison combines CDE’s rows for the same grades, weighted by students tested (our calculation). The district row combines its public schools in the same grades, weighted by students tested.

Grade 11 tests are one part of the picture. Graduation, readiness and college destinations answer different questions below.

Results since 20178 tested years shown

Chart and table: 2017–2026.

English top two levels, grade 11

This schoolCalifornia

0%50%100%20172022202668%57%

Math top two levels, grade 11

This schoolCalifornia

0%50%100%20172022202631%32%

The lines break across the COVID years, when state testing was waived or optional.

In grade 11, the share at the state’s top two levels in English went from 69% in 2017 to 68% in 2026, with 2025 and 2026 about the same. In math, it was 31% in both 2017 and 2026. Each year is a different group of students.

Each year’s results and tested counts

English · top two levels · grade 11
Year	This school	California
2017	69% 405 tested	60% 444,040 tested
2018	61% 366 tested	56% 439,134 tested
2019	72% 367 tested	57% 439,947 tested
2022	66% 328 tested	55% 427,007 tested
2023	68% 375 tested	55% 442,128 tested
2024	66% 335 tested	56% 435,296 tested
2025	68% 380 tested	57% 432,651 tested
2026	68% 333 tested	57% 414,559 tested

Math · top two levels · grade 11
Year	This school	California
2017	31% 405 tested	32% 442,457 tested
2018	25% 365 tested	31% 437,883 tested
2019	37% 367 tested	32% 438,107 tested
2022	27% 328 tested	27% 424,390 tested
2023	24% 372 tested	27% 440,912 tested
2024	26% 340 tested	28% 434,711 tested
2025	26% 380 tested	30% 431,903 tested
2026	31% 333 tested	32% 413,523 tested

What you can do

Who can act on Diamond Ranch’s results?

Pomona Unified’s board decides Diamond Ranch’s plan.

The state hasn’t placed Diamond Ranch in a support program. Federal designation under the Every Student Succeeds Act, 2025–26. Source

What has the state flagged?

The state is giving Pomona Unified extra help in 2026. It qualified on the 2025 and 2026 California School Dashboards. The 2026 Dashboard flagged results for students with disabilities on two measures: English, and math. The county office must help the district for at least three years, including a review of its yearly plan.

Extra help for Pomona Unified: CDE’s assistance status files for the 2025 and 2026 California School Dashboards. Source

When is the plan set, and how can you take part?

Pomona Unified’s board must adopt its yearly plan (LCAP) by July 1, after at least one public hearing at an earlier meeting.

How to take part

Watch the board’s agenda: the hearing is posted at least 72 hours ahead.
Send written comments on the actions and spending the plan proposes.
Raise questions through the district’s parent advisory committee; the superintendent must answer its comments in writing.
Read the midyear report, due by February 28.
Read Pomona Unified’s 2026–27 plan (LCAP, PDF)

Life at school

How many students here graduate, and where do they go next?

96% of students graduated in four years in 2024–25.

State graduation, readiness, college-going, attendance and suspension records

That compares with 89% across California. 44% were ready for college or career (state measure) in 2024–25. 80% of the class of 2023 enrolled in college within 12 months.

Preparation · each measure describes a different student group

Graduated in four years

96%

Across California: 89%

2024–25 · 338 of 353 students who started 9th grade together

Ready for college or career (state measure)

44%

Across California: 52%

2024–25 · 156 of 353 students in the state’s measure

Finished the UC/CSU course list

53%

Average California high school: 56%

2024–25 · 180 of 338 graduates finished the UC/CSU course list

Destinations · class of 2023

Where students who finished high school went

80% enrolled in college within 12 months · 348 students who finished high school

University of California UC detail ↓38 · 11%
California State University CSU detail ↓91 · 26%
California community college120 · 35%
In-state private12 · 3%
Out-of-state, 4-year16 · 5%
Out-of-state, 2-year0 · 0%
Not enrolled71 · 20%

Source: CDE college-going records, class of 2023. Shares are our arithmetic: each count divided by all high-school completers (graduates and other students who finished), rounded together so they total 100. “Not enrolled” does not describe employment, military service or other routes.

What could my child study here?

AP courses the school is approved to teach

The College Board approved this school to teach 21 AP courses in 6 subjects for 2025–26.

College Board AP Course Audit Ledger · 2025–26. Authorization doesn’t show which courses run or who can take them; ask the school.

Math & Computer Science4
Sciences4
English2
History & Social Science6
World Languages & Cultures4
Arts1

Every approved AP course21 courses in 6 subjects

Math & Computer Science 4

Calculus AB
Calculus BC
Precalculus
Statistics

Sciences 4

Biology
Chemistry
Environmental Science
Physics 1

English 2

English Language and Composition
English Literature and Composition

History & Social Science 6

Human Geography
Macroeconomics
Psychology
U.S. Government and Politics
United States History
World History: Modern

World Languages & Cultures 4

Chinese Language and Culture
French Language and Culture
Spanish Language and Culture
Spanish Literature and Culture

Arts 1

2-D Art and Design

What other courses and pathways are on record?

College courses in high school (dual enrollment)

93 students took one

2023–24

Students taking a college course for credit while in high school, often through a community college. Federal Civil Rights Data Collection, school-reported.

Ask: How does the school help students who don’t go to college plan what comes next?

Where these figures come fromEach measure’s source, student group and definition

Graduated in four years: 2024–25 · 338 of 353 students who started 9th grade together. California Department of Education, adjusted cohort graduation records. Comparison is SchoolScope’s combination of graduates and cohort counts across the reference schools, not CDE’s published state rate.
Ready for college or career (state measure): 2024–25 · 156 of 353 students in the state’s measure. California Department of Education, College/Career Indicator (CCI), overall “Prepared” rate, among the students in the indicator’s group. Prepared is CDE’s overall classification, not AP participation or a college admission rate.
Finished the UC/CSU course list: 2024–25 · 180 of 338 graduates finished the UC/CSU course list. California Department of Education, A–G completion records (graduates who met the UC/CSU course requirements). Course completion is separate from college enrollment.
Where students who finished high school went: CDE college-going records, class of 2023. College enrollment is counted for 12 months after finishing high school and matched to college records, so this runs about two years behind. A dash is unavailable, not zero.

A closer look: UC and CSU admission recordsApplied, admitted and enrolled, from each university system’s own records

UC’s own records

University of California

Fall 2025 first-year entry · counts, not a school rating

Applied: 80
Admitted: 67
Enrolled: 30

By campus · fall 2025

UC IrvineApplied 63 · Admitted 13 · Enrolled 4
UCLAApplied 60 · Admitted 5 · Enrolled 4
UC RiversideApplied 56 · Admitted 49 · Enrolled 6
UC San DiegoApplied 50 · Admitted 24 · Enrolled 8
UC Santa BarbaraApplied 35 · Admitted 14 · Enrolled 3
UC BerkeleyApplied 26 · Admitted under 3 · Enrolled under 3
UC MercedApplied 26 · Admitted 25 · Enrolled under 3
UC DavisApplied 19 · Admitted 12 · Enrolled 4
UC Santa CruzApplied 9 · Admitted 7 · Enrolled under 3

These records don’t show the school’s effect on admission. A student can apply to several campuses, so campus counts don’t add up to the total. UC blanks counts under 5 applicants or under 3 admits or enrollees; “+” marks a partial count; a dash is unavailable. Source: UC admissions by source school.

Each fall since 2016

Fall 2025Applied 80 · Admitted 67 · Enrolled 30
Fall 2024Applied 116 · Admitted 77 · Enrolled 24
Fall 2023Applied 127 · Admitted 82 · Enrolled 41
Fall 2022Applied 113 · Admitted 73 · Enrolled 37
Fall 2021Applied 114 · Admitted 68 · Enrolled 32
Fall 2020Applied 105 · Admitted 80 · Enrolled 45
Fall 2019Applied 102 · Admitted 62 · Enrolled 24
Fall 2018Applied 117 · Admitted 67 · Enrolled 36
Fall 2017Applied 131 · Admitted 100 · Enrolled 60
Fall 2016Applied 116 · Admitted 80 · Enrolled 50

CSU’s own records

California State University

Fall 2025 first-year entry · counts, not a school rating

Applied: 170
Admitted: 166
Enrolled: 77

By campus · falls 2021–2025 added together

Five years in each number, not one. CSU publishes campus counts only as five-year totals, so these aren’t comparable to the fall 2025 figures above or to UC’s one-fall campus bars.

Cal Poly PomonaApplied 689 · Admitted 572 · Enrolled 200
Cal State FullertonApplied 597 · Admitted 460 · Enrolled 85
Cal State Long BeachApplied 455 · Admitted 255 · Enrolled 50
Cal State LAApplied 280 · Admitted 259 · Enrolled 23
San Diego StateApplied 256 · Admitted 43 · Enrolled under 6
Cal State San BernardinoApplied 188 · Admitted 183 · Enrolled 25
Cal Poly San Luis ObispoApplied 85 · Admitted 43 · Enrolled under 6
Cal State NorthridgeApplied 64 · Admitted 61 · Enrolled 7
Cal State Dominguez HillsApplied 54 · Admitted 48 · Enrolled under 6
San Francisco StateApplied 52 · Admitted 51 · Enrolled under 6
Cal State San MarcosApplied 46 · Admitted 45 · Enrolled under 6
San José StateApplied 39 · Admitted 35 · Enrolled under 6
CSU Channel IslandsApplied 32 · Admitted 30 · Enrolled under 6
Chico StateApplied 31 · Admitted 30 · Enrolled under 6
Cal State East BayApplied 30 · Admitted 27 · Enrolled under 6
Cal State Monterey BayApplied 28 · Admitted 27 · Enrolled under 6
Fresno StateApplied 27 · Admitted 26 · Enrolled —
Cal Poly HumboldtApplied 26 · Admitted 25 · Enrolled under 6
CSU BakersfieldApplied 25 · Admitted 21 · Enrolled —
Sacramento StateApplied 25 · Admitted 25 · Enrolled under 6
Sonoma StateApplied 12 · Admitted 12 · Enrolled —
Cal Poly Maritime AcademyApplied under 6 · Admitted under 6 · Enrolled —
Stanislaus StateApplied under 6 · Admitted under 6 · Enrolled —

These records don’t show the school’s effect on admission. A student can apply to several campuses, so campus counts don’t add up to the total. CSU withholds counts under 6; a dash is unavailable. Students who reach CSU from a community college aren’t counted here. Source: CSU High School Success dashboard.

Each fall since 2021

Fall 2025Applied 170 · Admitted 166 · Enrolled 77
Fall 2024Applied 192 · Admitted 188 · Enrolled 90
Fall 2023Applied 198 · Admitted 189 · Enrolled 88
Fall 2022Applied 168 · Admitted 163 · Enrolled 75
Fall 2021Applied 191 · Admitted 185 · Enrolled 90

How often do students miss school or get suspended?

27 in 100 students were chronically absent in 2025–26. That means they missed 10% or more of school days. 0.6% of students were suspended at least once in 2025–26, against 2.9% at the average California high school.

Context Close to the 28 in 100 at the average Pomona Unified high school: a pattern across the district.

Source

Source: CDE chronic absenteeism and suspension files, 2025–26
Students: chronic absence: 408 of 1,523 students counted for it; suspension: 9 of 1,571 students enrolled during the year
Comparison: Each comparison is the rate at the average school (our average of school rates), not a pooled rate. Also: suspensions at the average Pomona Unified high school 2.9%.

Chronically absent, 2025–26

27 in 100This school

28 in 100At the average Pomona Unified high school

22 in 100At the average California high school

408 of 1,523 students were chronically absent, meaning they missed 10% or more of school days.

Suspensions, 2025–26

0.6%

of students were suspended at least once (9 of 1,571). Average California high school 2.9%.

Ask: When a child starts missing school, who calls the family, and how soon?

Ask families and staff yourselfWhat to ask the people at Diamond Ranch

Ask current families how the school keeps them informed, and what happened when their child needed help. Ask staff how long teachers tend to stay.

Questions for your visit ↓

Have a child here? Answer 7 questions Responder en español

Teach here? Tell us Pomona Unified’s email domain so staff can answer our workplace questions.

Every learner

How do kids like mine do here?

Hispanic or Latino and low-income students here scored well above the same groups across California in English.

Student groups, grade 11, spring 2026

Both groups score below California’s rate for all students statewide. 66% of Hispanic or Latino students scored Proficient or Advanced in English (grade 11, spring 2026), against 49% for the same group across California. Low-income students: 65% in English, against 49% for the same group across California.

Source

Source: California Department of Education, CAASPP research file, spring 2026
Students: grade 11; each row gives its tested count. Low-income is CDE’s “socioeconomically disadvantaged”.
Comparison: California: the same group in the same grades, CDE’s rows for the whole state combined and weighted by students tested (our calculation).

Diamond RanchSame group, CaliforniaAhead of the same group across California, where that group scores below California’s rate for all students

Low-incomeEnglish · 268 testedAhead of the same group across California, where that group scores below California’s rate for all students: 65%Same group, California 49%
Low-incomeMath · 268 tested28%Same group, California 23%
Hispanic or LatinoEnglish · 271 testedAhead of the same group across California, where that group scores below California’s rate for all students: 66%Same group, California 49%
Hispanic or LatinoMath · 271 tested24%Same group, California 21%
Students with disabilitiesEnglish · 30 tested30%Same group, California 19%
Students with disabilitiesMath · 30 tested0%Same group, California 8%

Proficient or Advanced, grade 11, spring 2026.

Who are the students?

2025–26 · students counted

Hispanic or Latino78%
Asian9%
Black or African American4%
White3%
Filipino2%
Two or more races2%
Not reported<1%
American Indian or Alaska Native—
Pacific Islander—
Unallocated share1%

A dash means the share isn’t available; it isn’t zero. The unallocated share is what’s left after the shares we have; it isn’t a student group. “Not reported” is different: it is a category in the state’s own count of students. Source and comparisons: the full student mix below.

Are English learners moving up on the state’s English test?

37% of English learners here moved up at least one level on the state’s English test (ELPAC), or stayed at the top, spring 2025 to spring 2026.

Spring 2025 to spring 2026 · English learners with state English test (ELPAC) scores in both years

This school · 35 of 95 English learners37%

Pomona Unified · 1,371 of 2,97346%

California · 355,274 of 748,91647%

It counts students moving up the test’s levels, so a student can count here before becoming fluent. Data source: California Department of Education, 2026 Dashboard ↗.

Who are the families and teachers?

79%of students qualified for free or reduced-price meals in 2024–25, 1,213 of 1,542. California: 63%.

69teachers, 2024–25

11 yearsaverage experience, 2024–25

7%in their first year, 2024–25

80%of teaching positions with proper credential and placement, 2021–22

Ask: How does the school keep Hispanic or Latino and low-income students on track as they move up through the grades?

All group results, district comparisons and sources

Proficient or Advancedgrade 11 · spring 2026

Group and subject	Here	vs Pomona Unified	vs California
Low-income · 268 tested
English	65%	+1154%	+1649%
Math	28%	+226%	+523%
Hispanic or Latino · 271 tested
English	66%	+1353%	+1749%
Math	24%	−226%	+321%
Students with disabilities · 30 tested
English	30%	+1713%	+1119%
Math	0%	−66%	−88%

Each gap is to the same group, grades and subject: in Pomona Unified, and across California. ■ Green: a group that is behind across California does much better here, by 10 points or more and more than twice the margin of error.

Asian students and English learners: fewer than 30 tested here. No published rate here for Black or African American, Filipino, White, American Indian or Alaska Native, Pacific Islander, homeless and military-family students, students of two or more races and foster youth. That can reflect privacy rules or small numbers; it isn’t evidence of a gap. This table covers groups by income, race or ethnicity, language and disability; girls and boys aren’t split out.

Full student mix, comparisons and sources, 2025–26

Students, 2025–26	Here
Hispanic or Latino	78%
Asian	9%
Black or African American	4%
White	3%
Filipino	2%
Two or more races	2%
Not reported	<1%
American Indian or Alaska Native	—
Pacific Islander	—

Data source: California Department of Education chronic-absence file, 2025–26. Shares are of the students the file counts for attendance (CDE’s “eligible enrollment”); unavailable categories are shown as a dash.

How the credential rate is counted

CDE SARC report 2024–25, measured 2021–22: 80% of teaching positions, 52.8 properly credentialed teaching-position FTE out of 65.7 total position FTE. This measures positions, not individual teachers.

Next steps

Which schools feed into Diamond Ranch, and how do I get in?

From Lorbeer Middle.

Each school’s standing compares it with California schools at its own level.

Middle · assigned

Lorbeer Middle 55th · Solid · 2026

Fed by 4 elementary schools

High · this school

Diamond Ranch High

Its middle school is assigned here.

From the district’s 2026 attendance boundaries. A boundary doesn’t guarantee placement: transfers, permits, magnets and other programs can change the path. Check your child’s address and current assignment with the district. Explore schools on the map

All feeding elementary schools (4)Grouped by the middle school each one feeds, with each school’s standing

Into Lorbeer Middle

Golden Springs Elementary57th · Solid · 2026
Decker Elementary17th · Needs Support · 2026
Ranch Hills Elementary70th · Solid · 2026
Pantera Elementary97th · Strong · 2026

All recorded links and nearby alternatives

Elementary links

Golden Springs Elementary
Assigned
57th percentile · Solid · elementary · 2026
Decker Elementary
Assigned
17th percentile · Needs Support · elementary · 2026
Ranch Hills Elementary
Assigned
70th percentile · Solid · elementary · 2026
Pantera Elementary
Assigned
97th percentile · Strong · elementary · 2026

Middle-school links

Lorbeer Middle
Assigned
55th percentile · Solid · middle · 2026

Links do not guarantee placement. Charter, magnet, transfer and other admission routes can differ. Each school’s percentile compares it with California schools at its own level (continuation and alternative schools only with their own kind); the stages are not one ranking.

How do I get in?

Ask Pomona Unified which school serves your address.

School website: diamondranch.pusd.org ↗Office: (909) 397-4715Administrator: Mark Gomez

Location and visiting

Get directions

100 Diamond Ranch Drive, Pomona 91766

Directory location · Explore nearby schools on the map. Confirm which school serves your address with Pomona Unified.

Questions for your visit

How much of each day do English learners spend learning English, and how do families see their progress? 37% of English learners moved up at least one level on the state’s English test (ELPAC), or stayed at the top, spring 2025 to spring 2026 (35 of 95 students); California: 47%
What extra help do students who are behind get, and how do you know it’s working? 69% in math scored at the Developing or Minimal level, grade 11, spring 2026 (333 students tested); California: 68%
How does the school help students who don’t go to college plan what comes next?
When a child starts missing school, who calls the family, and how soon?
Which courses and career pathways does the school run, and who can enroll?
What support is available when a student falls behind on graduation requirements?

Office (909) 397-4715100 Diamond Ranch Drive, directions (opens Google Maps in a new tab)

Nearby high schoolsClosest first, by straight-line distance

The closest high schools, by straight-line distance from this campus. Distance isn’t an attendance boundary.

Nearby high schoolsPercentile among California high schools, 2025

Fremont Academy of Engineering and Design1.6 mi
36thDevelopingScope Score 51
Garey High1.6 mi
32ndDevelopingScope Score 50

Each percentile compares a school with California schools at its own level.

Explore nearby schools on the map

Source records

Every figure on this page, with its source, grades, year and count.

Score factorssource values, index and weights · 2024–25 · ranked #737 of 1,498 California high schools we score · #2 of 6 in Pomona Unified

Score factors, 2024–25
Factor	School	Index	Weight
Graduation rate	96%	60	25%
Exceeded standardaverage of English and math	21%	55	22%
Ready for college or career (state measure)	44%	50	20%
Met or exceededaverage of English and math	47%	58	18%
Chronically absent	24 in 100	55	5%
Suspension rate	2.5% (40 of 1,619)	55	5%
English learners: top level	11%	42	5%

Index is where the school's value sits among the California high schools we score, from 0 to 100, where 50 is their average; it is not a percentile. School values are from 2024–25. Chronic absence and suspension are CDE's all-students school rates; the score uses an adjusted version of each that pulls small schools toward the average, so their index can sit nearer 50 than the rate suggests.

Scope Score by year2018–19 to 2024–25 · each year’s inputs, and the score for each year we could verify

The 2024–25 Scope Score, in the current-formula row below, uses the state’s college-or-career readiness measure, 2024–25. No verified earlier Scope Scores are available here.

Scope Score

School year	Scope Score	Percentile	Rank	Comparison group
2024–25	56	50	#737	California high schools · 1,498 schools · current formula

2018–19, 2021–22, 2022–23 and 2023–24 have records on file but no Scope Score we could verify against that year’s source files, so no score is shown for them.

School year	Chronic absence	Suspension
2018–19	9 in 100	4.3% (71 of 1,655)
2021–22	not on file	not on file
2022–23	not on file	not on file
2023–24	24 in 100	4.1% (68 of 1,652)
2024–25	24 in 100	2.5% (40 of 1,619)

Chronic absence and suspension are CDE’s all-students school rates for each year.

No 2019–20 or 2020–21 records in this SchoolScope series

Results by gradeEnglish and math · grade 11 · spring 2026 · % of tested students

What each level means: California's level descriptions.

English · 2025–26 results by grade

Share of students tested, spring 2026
English	Tested	Advanced	Proficient	Developing level	Minimal	Proficient or Advanced	California	Difference
Grade 11	333	24%	44%	19%	13%	68%	57%	+11

California is CDE’s statewide English row for each grade, counting every student tested there; the comparisons in the chapters combine these rows for their grades, weighted by students tested (our calculation).

Math · 2025–26 results by grade

Share of students tested, spring 2026
Math	Tested	Advanced	Proficient	Developing level	Minimal	Proficient or Advanced	California	Difference
Grade 11	333	13%	18%	21%	48%	31%	32%	−1

California is CDE’s statewide math row for each grade, counting every student tested there; the comparisons in the chapters combine these rows for their grades, weighted by students tested (our calculation).

A grade the school doesn't teach has no row. “Suppressed” marks a result CDE blanks because fewer than 11 students tested (CDE’s reporting rule); “none tested” marks a grade CDE lists with no students tested; “not on file” marks a result missing from the records we hold. None of them means zero.

Every tested year2017–2026 · rates, tested counts, and each grade

English and math by test year · all tested grades

Year · subject	Students with scores	Top level	Top two levels
2026 · English	333	24%	68%
2026 · Math	333	13%	31%
2025 · English	380	32%	68%
2025 · Math	380	9%	26%
2024 · English	335	32%	66%
2024 · Math	340	9%	26%
2023 · English	375	34%	68%
2023 · Math	372	8%	24%
2022 · English	328	36%	66%
2022 · Math	328	9%	27%
2019 · English	367	39%	72%
2019 · Math	367	12%	37%
2018 · English	366	27%	61%
2018 · Math	365	7%	25%
2017 · English	405	35%	69%
2017 · Math	405	13%	31%

Each year names its school year end (2026 = 2025–26). “Students with scores” counts each subject on its own, so don’t add the English and math counts together. A dash is unavailable, not zero.

Earlier years · grade and subject

Year · grade · subject	Students with scores	Met or exceeded
2025 · Grade 11 · English	380	68%
2025 · Grade 11 · Math	380	26%
2024 · Grade 11 · English	335	66%
2024 · Grade 11 · Math	340	26%
2023 · Grade 11 · English	375	68%
2023 · Grade 11 · Math	372	24%
2022 · Grade 11 · English	328	66%
2022 · Grade 11 · Math	328	27%
2019 · Grade 11 · English	367	72%
2019 · Grade 11 · Math	367	37%
2018 · Grade 11 · English	366	61%
2018 · Grade 11 · Math	365	25%
2017 · Grade 11 · English	405	69%
2017 · Grade 11 · Math	405	31%

Current 2025–26 grade results appear above. “Students with scores” counts the students tested in that grade, subject and year. A missing result is not zero, and each year’s row is a different group of children.

Science (CAST)schoolwide · spring 2026

Science (CAST)	Tested	Advanced	Proficient	Developing level	Minimal
Schoolwide	369	5%	17%	64%	14%

CAST is tested in grades 5 and 8, then once in grade 10, 11, or 12. This row is the school's all-student aggregate. Not part of the Scope Score.

Student groups: test resultsEnglish · spring 2026 · against the same group in the district and California

Group · English	Tested	Proficient or Advanced	vs district	vs California
Low-income	268	65%	+11	+16
Hispanic or Latino	271	66%	+13	+17
Students with disabilities	30	30%	+17	+11

Attendance and suspensionsState records · this school and each student group · 2018–19 and 2025–26

CDE’s all-students school rates for 2024–25 and 2025–26; the change is the difference between the two rates as printed.

Year-over-year school rates
Chronic absenteeism2024–25 · 24 in 100 → 2025–26 · 27 in 100 · +3 in 100
Suspension rate2024–25 · 2.5% (40 of 1,619) → 2025–26 · 0.6% (9 of 1,571) · −1.9 percentage points

Group	2018–19	2025–26	Change
Female	9 in 100	30 in 100	+21 in 100
Male	9 in 100	24 in 100	+15 in 100
Asian	7 in 100	18 in 100	+11 in 100
Black or African American	19 in 100	26 in 100	+7 in 100
Filipino	2 in 100	24 in 100	+22 in 100
Hispanic or Latino	9 in 100	28 in 100	+19 in 100
Two or more races	5 in 100	28 in 100	+23 in 100
White	13 in 100	19 in 100	+6 in 100
Students with disabilities	20 in 100	38 in 100	+18 in 100
English learners	17 in 100	35 in 100	+18 in 100
Foster youth	46 in 100	—	—
Homeless	14 in 100	54 in 100	+40 in 100
Low-income	10 in 100	29 in 100	+19 in 100
All students	9 in 100	27 in 100	+18 in 100

Two reported school years only; no intervening-year result is implied. Source: CDE school-level chronic absenteeism by student group.

Graduation and readinessstate records · each rate for its own year and class of students

Measure	Source record
This school · CCI overall Prepared	CDE College/Career Indicator · CCI source year 2025 · all students · all students in the current four-year graduation cohort, plus only Prepared fifth-year graduates from the prior cohort. Overall CCI Prepared rate 44% · numerator 156 students classified Prepared · denominator 353 CCI students.
California · CCI overall Prepared	CDE statewide CCI cohort · CCI source year 2025 · all students · overall Prepared rate 52% · numerator 257,567 students classified Prepared · denominator 497,814 CCI students.

AP pathway among CCI Prepared studentsCDE College/Career Indicator · CCI source year 2025 · all students · AP pathway rate 52% · AP-pathway numerator 81 · denominator 156 (CCI Prepared students). This measure uses Prepared students as its denominator, not the whole CCI cohort; it is not an AP exam-taking rate or a count of AP courses offered. That cohort includes all students in the current four-year graduation cohort plus only Prepared fifth-year graduates from the prior cohort. In 2025 the pathway accepts two qualifying AP exams, two qualifying AP courses, or a combination of one of each in different subjects.

CDE's overall Prepared rate is the college-readiness factor in the Scope Score (20% of the high school score). The school rate is 156 of 353 CCI students, not the AP-only pathway or A–G completion rate. The California figure is CDE's statewide CCI student cohort, not an average of SchoolScope's comparable high schools or the SchoolScope school-rank pool.

Graduation rate

96%

AP route, among those ready for college or career

52%

2025 CDE CCI cohort · AP courses, exams, or both; share of students ready for college or career (CDE’s “Prepared”), not course offerings

Finished the UC/CSU course list (A–G)

53%

A–G are the 15 courses (across 7 subjects) required for UC/CSU eligibility

College-going rate

80%

These source periods and populations differ: graduation uses an adjusted cohort, while A–G completion and college-going use separately reported groups. The rates are shown individually, without a shared performance tier.

UC admissions, universitywidefall 2016–2025 · applied, admitted, enrolled, mean GPA · summed across CEEB codes

Year	Applied	Admitted	Enrolled	Mean GPA (applied)	Mean GPA (admitted)	Mean GPA (enrolled)
2025	80	67	30	3.86	3.92	4.06
2024	116	77	24	3.77	3.94	4.10
2023	127	82	41	3.82	4.00	4.08
2022	113	73	37	3.85	4.03	4.07
2021	114	68	32	3.70	3.88	3.95
2020	105	80	45	3.87	4.03	4.10
2019	102	62	24	3.84	4.01	4.08
2018	117	67	36	3.73	3.98	4.02
2017	131	100	60	3.74	3.90	3.92
2016	116	80	50	3.74	3.91	3.95

Source: UC admissions by source school. Dated fall first-year UC applicants, admitted students, and enrollees. GPA is each group's mean weighted, capped high-school GPA for 10th/11th-grade college-preparatory courses. SchoolScope leaves GPA unavailable when several CEEB codes contribute rather than combining their means. UC blanks counts under 5 applicants or under 3 admits or enrollees, shown here as “under 5” or “under 3”; — means unavailable, and a reported zero remains zero. A + marks a partial SchoolScope sum of observed counts, not a complete total; missing contributions may be zero. No admit rate is computed here. Complete, matching counts can support a historical descriptive rate, but do not establish a school's effect or predict individual chances. Series shown from 2016.

UC admissions by campuslatest falls on file · each campus counted separately

Campus	Year	Applied	Admitted	Enrolled
Berkeley	2025	26	under 3	under 3
Berkeley	2024	43	4	under 3
Berkeley	2023	49	9	under 3
Berkeley	2022	50	11	8
Berkeley	2021	30	4	under 3
Davis	2025	19	12	4
Davis	2024	25	8	under 3
Davis	2023	39	13	under 3
Davis	2022	31	15	3
Davis	2021	27	8	4
Irvine	2025	63	13	4
Irvine	2024	92	17	5
Irvine	2023	98	14	5
Irvine	2022	95	15	4
Irvine	2021	89	12	under 3
Los Angeles	2025	60	5	4
Los Angeles	2024	82	8	4
Los Angeles	2023	86	7	6
Los Angeles	2022	81	5	under 3
Los Angeles	2021	73	7	6
Merced	2025	26	25	under 3
Merced	2024	20	19	3
Merced	2023	19	18	under 3
Merced	2022	16	14	3
Merced	2021	17	13	under 3
Riverside	2025	56	49	6
Riverside	2024	68	47	under 3
Riverside	2023	66	45	13
Riverside	2022	69	43	12
Riverside	2021	67	33	7
San Diego	2025	50	24	8
San Diego	2024	67	31	8
San Diego	2023	64	28	12
San Diego	2022	60	26	4
San Diego	2021	66	9	4
Santa Barbara	2025	35	14	3
Santa Barbara	2024	39	14	under 3
Santa Barbara	2023	46	15	under 3
Santa Barbara	2022	47	14	under 3
Santa Barbara	2021	53	15	3
Santa Cruz	2025	9	7	under 3
Santa Cruz	2024	21	9	under 3
Santa Cruz	2023	32	19	3
Santa Cruz	2022	19	9	under 3
Santa Cruz	2021	24	15	4
Universitywide	2025	80	67	30
Universitywide	2024	116	77	24
Universitywide	2023	127	82	41
Universitywide	2022	113	73	37
Universitywide	2021	114	68	32

Source: UC admissions by source school. Dated fall first-year UC applicants, admitted students, and enrollees. Campus totals are not interchangeable with Universitywide; students can apply to several campuses. Universitywide is separately reported; never derive it by adding campus rows. Universitywide applicant and admit counts are unduplicated. UC blanks counts under 5 applicants or under 3 admits or enrollees, shown here as “under 5” or “under 3”; — means unavailable, and a reported zero remains zero. A + marks a partial SchoolScope sum of observed counts, not a complete total; missing contributions may be zero. No admit rate is computed here; these records do not establish a school's effect or predict individual chances.

AP course catalog2025–26 · College Board course authorizations

Subject	Authorization recorded for
2-D Art and Design	this school
Biology	this school
Calculus AB	this school
Calculus BC	this school
Chemistry	this school
Chinese Language and Culture	this school
English Language and Composition	this school
English Literature and Composition	this school
Environmental Science	this school
French Language and Culture	this school
Human Geography	this school
Macroeconomics	this school
Physics 1	this school
Precalculus	this school
Psychology	this school
Spanish Language and Culture	this school
Spanish Literature and Culture	this school
Statistics	this school
U.S. Government and Politics	this school
United States History	this school
World History: Modern	this school

Authorization ≠ a section running this year — the Ledger records what the school may teach, not seat counts.

Advanced coursework, federal snapshot2023–24 · Civil Rights Data Collection · dated historical snapshot

Measure	This school
AP offered	offered
AP course count	19
AP enrollment (male/female)	361
IB participation	not reported
Dual enrollment	offered · 93 enrolled
Algebra I in grade 8	not reported
Calculus sections	0
Physics sections	5
Chemistry sections	13
Reported male/female enrollment (CRDC)	1,555

These counts aren’t part of the Scope Score. “Not reported” means the federal record has no value for that item; it isn’t a zero. Enrollment counts add the male and female students the survey reports.

College destinationsclass of 2023 · state college-going records, 12 months after graduation

Destination	Completers	% (derived)
University of California	38	11%
California State University	91	26%
California community college	120	35%
In-state private	12	3%
Out-of-state, 4-year	16	5%
Out-of-state, 2-year	0	0%
Not enrolled	71	20%

348 students who finished high school, class of 2023 · state-reported college-going rate 80% · % column is computed by SchoolScope (count ÷ all who finished high school; CDE calls them completers), not a CDE-native rate · an unavailable or suppressed cell is marked as missing; a reported zero remains distinct · source: CDE 12-mo CGR, 2023 cohort (the newest published), National Student Clearinghouse match — a different, older vintage than the fall 2025 UC admissions rows above.

Fundingschool and district spending, from state and federal finance records · each row names its fiscal year and measure

Per-pupil spending

District · current expense$15,804 per pupil

NCES F-33 · FY 2020–21 (2021) · fall district membership: 22,388 pupils

California · selected district mean$14,491 per pupil

NCES F-33 · FY 2020–21 (2021) · SchoolScope’s unweighted mean across 818 selected California district finance records

School-level federal expenditures$189 per pupil

CDE ESSA · school-attributed per-pupil record · FY 2024–25 (2025) · source denominator: 1,542

Central federal expenditures attributed here$867 per pupil

CDE ESSA · central expenditures attributed to this school · FY 2024–25 (2025) · source denominator: 1,542

District current expense · FY 2024–25$24,467 per ADA

CDE SACS Current Expense of Education · district fiscal year ending 2025 · average daily attendance denominator

These figures are not directly comparable: school ESSA attributed spending and NCES district current expense use different measures and populations. Their fiscal years are labeled above.

How the California mean was selected

SchoolScope starts with its selected California finance records, not every NCES California district. For FY 2020–21, it calculates an unweighted mean of NCES F-33 current expense per pupil. District records contribute once, regardless of enrollment. The calculation keeps records with positive per-pupil current expense, enrollment over 100, CCD agency type 1, and a recorded district name; it excludes names ending in County Office of Education, Department of Education, or Superintendent of Schools. This is a SchoolScope calculation, not a state-published spending average.

Selected General Fund operating costs · FY 2024–⁠25 · SchoolScope calculation

Instruction 60%Instruction support 15%Student services 10%Administration 6%Buildings & maintenance 9%

The arithmetic behind these shares · FY 2024–25
Group	Dollars	Share, to two decimals	Printed
Instruction	$258,823,017	59.87%	60%
Instruction support	$64,775,598	14.98%	15%
Student services	$41,179,510	9.53%	10%
Administration	$26,575,872	6.15%	6%
Buildings & maintenance	$39,585,068	9.16%	9%
Total	$432,322,715	100.00%	100%

These shares are our arithmetic: each group’s dollars divided by the $432,322,715 total of the groups shown, rounded to whole percents by largest remainder so they add up to 100. Dollar amounts are rounded to the nearest dollar, so they can differ from the total by a dollar. SchoolScope groups district-level CDE SACS UserGL actuals from Fund 01, using operating objects 1000–5999 and excluding retiree benefits, food and community services, facilities acquisition, other outgo, and nonagency goals. These shares use that filtered total; they do not exactly break down CDE's official current expense per ADA above. The school-level ESSA figure uses a separate source.

NCES F-33 district fiscal-year history, 2017–⁠2021; latest district record shown: 2021

2021$15,804 per pupil

2020$14,909 per pupil

2019$15,089 per pupil

2018$14,936 per pupil

2017$13,497 per pupil

Source: NCES F-33 · Full district breakdown →

Staffing recordsstate teacher credential-and-placement and district salary records · each for its own year

Additional workforce records

Properly assigned intern credential holders0.9%

CDE 2024–25 SARC, Teacher Preparation and Placement table; measured school year 2021–22. Share of reported school teaching-position full-time equivalents assigned to properly assigned intern credential holders. A reported 0.0% is shown; unavailable rates are omitted. This is a position share, not a count of current teachers or of emergency permits.

The surrounding ZIP codeCensus Bureau survey, 2020–2024 · ZIP 91766 · not the school’s students

American Community Survey 5-year estimates · 2020–2024 · ZIP 91766 area
Measure	Estimate
Median household income	$81,991
Bachelor's degree or higher (adults 25+)	20%
ZIP-area population	69,327
Median age	35.4 years

Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates. Median household income covers the past 12 months and is reported in 2024 inflation-adjusted dollars. Bachelor's degree or higher uses adults age 25 and over as its population. A dash is unavailable, not zero; a reported zero remains zero. ZIP-area figures do not establish the school's attendance area or describe its enrolled students. These figures are not part of the Scope Score. See all schools in ZIP code 91766 →

Downloads, embed and methodologyCSV · embed code · sources · corrections

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Data sources: public data sources, including the California Department of Education · state tests (CAASPP) 2025–26 · Scope Score from 2024–25 results, compared across 1,498 high schools · attendance and suspensions by student group from 2018–19 and 2025–26 · district finance for the year each row names · Census survey (ACS) 2020–2024 · UC fall first-year source records — UC blanks counts under 5 applicants or 3 admits or enrollees; “+” marks a partial count; the all-campus total is reported separately · AP courses the College Board approved, 2025–26 (approved to teach, not enrollment) · federal civil rights data (CRDC) 2023–24, a past snapshot · state college-going records, class of 2023, matched to National Student Clearinghouse enrollment · Data updated October 15, 2026

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Diamond Ranch High — Rating & test scores

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Spring 2026 state test results

Common questions

How do I get in?

Is Diamond Ranch a good high school?

How often do students miss school or get suspended?

How does math compare with English?

How do kids like mine do here?

What could my child study here?

Where do students go after finishing high school here?

What should I ask on a visit?

How did students here do on state tests?

English

Math

How does math compare with English?

Have results changed?

English · top two levels · grade 11

Math · top two levels · grade 11

Each year’s results and tested counts

Who can act on Diamond Ranch’s results?

What has the state flagged?

When is the plan set, and how can you take part?

How many students here graduate, and where do they go next?

Graduated in four years

Ready for college or career (state measure)

Finished the UC/CSU course list

Where students who finished high school went

What could my child study here?

AP courses the school is approved to teach

Math & Computer Science 4

Sciences 4

English 2

History & Social Science 6

World Languages & Cultures 4

Arts 1

What other courses and pathways are on record?

University of California

Each fall since 2016

California State University

Each fall since 2021

How often do students miss school or get suspended?

Chronically absent, 2025–26

Suspensions, 2025–26

How do kids like mine do here?

Who are the students?

Are English learners moving up on the state’s English test?

Who are the families and teachers?

Which schools feed into Diamond Ranch, and how do I get in?

Into Lorbeer Middle

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Location and visiting

Questions for your visit

Source records

Scope Score

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Additional workforce records

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