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Colony High · Ontario

Colony High: This school runs ahead of the state average. The bar itself is the harder conversation.

Colony posts 37% meeting the standard against 36% statewide — ahead of most, with real headroom above the bar.

3850 East Riverside Drive, 91761 (opens in new tab)·Chaffey Joint Union High·Ontario·Grades 9-12·2,109 students·70% low-income·2024–25 CAASPP·(909) 930-2929·Website
2019–2025 trend · CDE CAASPP
This schoolCA avg
Scope4644
% Exceeded16%16%
% Met+37%36%
Grad rate88.8%87.6%
College readiness57.0%35.4%
Absence31.4%30.2%
Suspension4.9%3.6%
Scope Score
46
🌱 Building Momentum · Developing
ranked #1,011 statewide · #8 of 10 in Chaffey Joint Union High

Colony High scores 46 of 100 on SchoolScope's Scope Score — the 53rd percentile of 2,160 California high schools (CDE CAASPP 2025).

Measures test performance, attendance, and climate — not arts, community, or your kid. How we score →

🌱 Building Momentum — This label means the data doesn't clearly sort the school one way or the other — ask what the school is proud of, and what it's working on.

Most rating sites would stop at “37% proficient” and call it done. Colony deserves a closer read. The school sits in Ontario, where two-thirds of students qualify for free or reduced lunch — and reading the numbers without that context misreads the school.

Colony's low-income kids hit 51.5% proficiency in ELA — a number the same group reaches at 38.2% statewide. If you're trying to read past zip-code-driven test scores, that's the signal worth weighing.

The seven-year arc

Percentile among 2,160 high schools statewide

Slipped from the 68th to the 53rd percentile since 2019.

CA Dashboard
ELAOrange(Declined Significantly)MathBlue(Increased Significantly)

This school hasn't fully recovered from the pandemic: 37% meet the standard today, versus 47% in 2019 — a gap worth asking about on a visit.

ELA — % met or exceeded, by grade
Grade20192022202320242025
Grade 1160%62%66%58%54%
Math — % met or exceeded, by grade
Grade20192022202320242025
Grade 1135%25%25%19%21%

The story this school is actually telling

Proficient by 11th grade
37%
State 36%
Graduate
89%
State 88%
Pass an AP exam
57%
State 35%

Of 100 students here: 37 are proficient by 11th grade → 89 graduate → 57 pass an AP exam. The gaps between those bars are the questions to ask.

51.5%
Low-income · ELA · met standard

Colony's most underrated number

51.5% of low-income students met the ELA standard — versus 38.2% for the same group statewide. That's the strongest kind of signal a school can post: it holds across income lines.

Colony low-income: 51.5%State low-income: 38.2%

The 7 things our score weighs

Graduation rate
88.8%
State 87.6%
1.2pp above state avg
Exceeded standard
15.8%
State 15.8%
0.1pp below state avg
College readiness
57.0%
State 35.4%
AP exam pass rate above state avg
Met or exceeded
37.3%
State 35.7%
1.6pp above state avg
Chronic absenteeism
31.4%
State 30.2%
1.2pp above state avg
Suspension rate
4.9%
State 3.6%
1.2pp above state avg
EL proficiency (ELPAC)
9.6%
State 18.0%
8.4pp below state avg
Worth a school visit

Ask how the school challenges kids who clear the standard early. The gap between meeting and exceeding is where pacing shows.

  • Ask whether extra support — tutoring, counseling, small groups — reaches kids across income lines, not just the students already ahead.
  • Ask whether the tour can step into a working classroom — watch how the teacher handles a student who's stuck.
  • Ask to tour while school's in session, and notice how hallways and transitions feel — culture shows up between classes, not just in them.
  • Ask how the school communicates with families when a child starts to struggle.
  • Ask what a typical day looks like for a new student in the first few weeks.

How every group of students does here

At Colony High in Ontario, 51.5% of low-income students met or exceeded the ELA standard in 2025, compared to 63.9% district-wide and 38.2% statewide. Colony High trails its district average for low-income students by 12.4 percentage points in ELA. Other subgroups: Low-Income students (18.8% Math proficient); Hispanic students (58.1% ELA proficient). The largest proficiency gap is 41.9 percentage points for disabilities students. Data source: California Department of Education, CAASPP 2024-25. 357 students tested.

All students at this school: 37% met or exceeded
All StudentsAll Students: this school 37%, district —, state 36%37%
Socioeconomically DisadvantagedSocioeconomically Disadvantaged: this school 35%, district 46%, state 32%35% · −2 vs school
Hispanic/LatinoHispanic/Latino: this school 39%, district 46%, state 32%39% · +2 vs school
MaleMale: this school 34%, district 49%, state 42%34% · −3 vs school
FemaleFemale: this school 41%, district 54%, state 44%41% · +4 vs school
Black/African AmericanBlack/African American: this school 22%, district 42%, state 26%22% · −16 vs school
Students with DisabilitiesStudents with Disabilities: this school 7%, district 16%, state 15%7% · −31 vs school
English LearnersEnglish Learners: this school 10%, district 13%, state 11%10% · −28 vs school
AsianAsian: this school 43%, district 76%, state 72%43% · +5 vs school
WhiteWhite: this school 53%, district 63%, state 56%53% · +16 vs school
Two or More RacesTwo or More Races: this school 25%, district 54%, state 56%25% · −12 vs school
HomelessHomeless: this school 24%, district 33%, state 22%24% · −14 vs school
Pacific IslanderPacific Islander: too few students to report‹11
Foster YouthFoster Youth: too few students to report‹11
FilipinoFilipino: too few students to report‹11
American Indian/Alaska NativeAmerican Indian/Alaska Native: too few students to report‹11
this school district, same group California, same group

Showing up, and staying in class

Chronic absenteeismChronic absenteeism: this school 31.4%, district 34.8%, state 30.2%31.4% · +1.2pp vs state
Suspension rateSuspension rate: this school 4.9%, district —, state 3.6%4.9% · +1.2pp vs state
Chronic absenteeism by grade band
Grades 9–1231.4%

The people teaching here

Context — never part of the Scope Score
Student : teacherStudent to teacher ratio: this school 26:1, district 24:126:1
Teaching staff91 teachers
Avg. experience14.1 years
Fully credentialed92%
First-year teachers3%
Salary Schedule
Teacher salary schedule$63,832 – $151,282
Principal salary$0 – $210,457
Superintendent salary$344,190

Pay is set by the district, not the school.

Course Breadth
AP courses offered32
AP exam qualifiers151 students
CTE pathway completers56 students

What gets spent here

Per-pupil spendingPer-pupil spending: $18,463, CA average $14,815$18,463 · spent at this school
Federal share$856 per student

$856 per student arrives as federal Title funding — a measure of concentrated need, not school quality.

District current expense · FY 2024–25$18,946 per student

The district's current expense of education per student, from CDE's annual SACS filing — the freshest district spending figure the state publishes.

Where the district's dollars go · FY 2024–25 · CDE SACS
Instruction62%
Instruction support11%
Student services11%
Administration5%
Buildings & maintenance11%
Other1%

District-level, from the district's own SACS general-ledger filing — school-by-school breakdowns aren't published by the state.

district detail, 2016–2020 — the newest published
2020$13,126 per pupil
2019$12,897 per pupil
2018$13,298 per pupil
2017$12,162 per pupil
2016$12,487 per pupil

Source: NCES F-33 · Full district breakdown →

The neighborhood it serves

Hispanic66.5%
District 64.8% · CA 56.1%
Black12.8%
District 7.8% · CA 4.8%
White7.3%
District 12.8% · CA 19.9%
Asian7.1%
District 7.5% · CA 10.2%
Other6.4%
District 7.0% · CA 9.0%
Low IncomeFree/reduced lunch eligible 69.7% (6pp above CA avg)
Neighborhood — American Community Survey
Median income$101K · CA $85K
Median home value$635K · CA $659K
Bachelor's degree+24% · CA 35%
ZIP population62,935
Median age35 years

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2024) · ZIP-level

Worth Knowing

On the state's science test (CAST), 24% met or exceeded the standard — science is tested in grades 5 and 8 but never enters the Scope Score.

Frequently asked questions

Is Colony High a good high school?

Colony High has a Scope Score of 46 out of 100, placing it in the 53rd percentile of California high schools and ranked #1,011 statewide. 15.8% of students exceeded the state standard on the 2025 CAASPP assessment, which is near the California average of 15.8%. The Scope Score weights 7 dimensions for high schools: graduation rate (25%), exceeded standard (22%), college/career readiness (20%), met or exceeded (proficient) (18%), chronic absenteeism (5%), suspension rate (5%), and ELPAC English Learner proficiency (5%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.

What are Colony High's CAASPP test scores?

On the 2025 CAASPP Smarter Balanced Assessment, 37.3% of students at Colony High met or exceeded the state standard in ELA and Math combined, and 15.8% exceeded it. The gap between those numbers matters: 21.6% of students are at the proficiency floor, while 15.8% pushed past it. Most rating sites report only the combined "proficient" number. SchoolScope surfaces the exceeded-vs-met split because it reveals whether a school's curriculum challenges students beyond minimum proficiency or paces toward it. 964 student-subject combinations were assessed.

How does Colony High rank in California?

Colony High ranks #1,011 among California high schools by Scope Score, placing it in the 53rd percentile. This ranking is based on a weighted composite of 2025 CAASPP test performance (exceeded and met rates), chronic absenteeism, and suspension rate. Unlike single-number ratings, the Scope Score shows what drives the ranking so parents can decide what matters most to their family. See full methodology.

What is the attendance and school culture like at Colony High?

31.4% of students at Colony High are chronically absent (missing 10% or more of school days), compared to the California average of 30.2%. The suspension rate is 4.9%. SchoolScope includes these culture metrics in the Scope Score because they reflect day-to-day school experience in ways test scores alone cannot.

How does Colony High compare to other schools in Ontario?

Colony High scores 46/100 (53rd percentile) among California high schools. To compare with nearby schools, SchoolScope shows the same metrics side by side: exceeded rate, proficiency, growth trajectory, and school culture indicators. The school serves 2,109 students. Use the schools in Ontario page or the map view to compare all high schools nearby.

How does Colony High serve low-income and underrepresented students?

At Colony High in Ontario, 51.5% of low-income students met or exceeded the ELA standard in 2025, compared to 63.9% district-wide and 38.2% statewide. Colony High trails its district average for low-income students by 12.4 percentage points in ELA. Other subgroups: Low-Income students (18.8% Math proficient); Hispanic students (58.1% ELA proficient). The largest proficiency gap is 41.9 percentage points for disabilities students. Data source: California Department of Education, CAASPP 2024-25. 357 students tested. SchoolScope shows disaggregated test scores by demographic subgroup so you can see how a school performs for your child's specific group — not just the school-wide average. Subgroup data is context, not part of the Scope Score: we don't penalize schools for who they serve. See our equity approach.

Your other options

Private alternatives nearby

Private schools within ~10 miles. These schools do not participate in state testing and cannot be scored or ranked.


For the data nerds

Every number on this page

Score factors, grade-level breakdowns, subgroup proficiency, and peer comparisons.

01Score factorsWeighted composite · 2024–25
Graduation rate · 25%
88.8%
↑ vs CA 87.6% · 51th pctile
Exceeded standard · 22%
15.8%
↓ vs CA 15.8% · 50th pctile
College readiness · 20%
57.0%
↑ vs CA 35.4% · 63th pctile
Met or exceeded · 18%
37.3%
↑ vs CA 35.7% · 51th pctile
Chronic absenteeism · 5%
31.4%
↓ vs CA 30.2% · 49th pctile
Suspension rate · 5%
4.9%
↓ vs CA 3.6% · 44th pctile
EL proficiency (ELPAC) · 5%
9.6%
↓ vs CA 18.0% · 39th pctile
02By grade & subgroupCAASPP 2024–25 · % of tested students
ELATestedEXCMETNEARNOTMET++/CA
Grade 1148223%31%27%19%54%+7
MathTestedEXCMETNEARNOTMET++/CA
Grade 114829%12%27%52%21%−2
Science (CAST)TestedEXCMETNEARNOT
Grade 5/8/114744%20%67%9%

CAST is tested in grades 5, 8, and once in high school — not annually. Not part of the Scope Score.

Subgroup · ELATestedMET+vs districtvs CA
Socioeconomically Disadvantaged35751.5%−12+13
Hispanic/Latino32258.1%−7+19
Black/African American6232.3%−26−0
03Peer comparison · nearest high schoolssorted by Scope Score
SchoolDistScopeEXCMET+GrowthSusp
Colony High ←4615.8%37.3%4.9%
California average4415.8%35.7%3.6%
04More measurescontext · not all part of the Scope Score
Graduation Rate
88.8%
AP Exam Prepared
57.0%
A-G Completion
64.8%
A-G are the 15 courses (across 7 subjects) required for UC/CSU eligibility
College-Going Rate
67.2%
YearScopePctileRankExcMet+AbsentSuspGrowth
20195468#64421.7%47.4%10.3%4.9%
20224863#78517.3%43.3%42.2%7.1%
20234967#71618.1%45.4%20.0%7.6%
20244759#87615.0%38.6%23.6%7.3%
20254653#101115.8%37.3%31.4%4.9%
NO STATEWIDE TESTING 2020–21 (COVID) · SCORE AND PERCENTILE ARE RELATIVE TO EACH YEAR'S FIELD
05Climate by student groupchronic absenteeism · 2019 vs 2025 — the two years CDE publishes at subgroup level
Group20192025Δ
Female10.2%31.6%+21.4pp
Male9.4%31.2%+21.8pp
Asian7.5%13.5%+6.0pp
Black/African American8.2%41.9%+33.7pp
Filipino15.4%47.9%+32.5pp
White6.7%11.6%+4.9pp
Hispanic/Latino9.5%31.6%+22.1pp
Pacific Islander25.0%28.6%+3.6pp
Two or More Races13.6%18.2%+4.6pp
Students with Disabilities16.1%40.8%+24.7pp
English Learners17.6%31.2%+13.6pp
Foster Youth35.0%44.0%+9.0pp
Homeless21.0%51.4%+30.4pp
Socioeconomically Disadvantaged10.4%34.9%+24.5pp
All Students9.8%31.4%+21.6pp
EXC = exceeded standard · MET+ = met or exceeded ("proficient") · Source: CA Dept. of Education · CAASPP 2024–25 · n=2,160 high schools · Vintages: climate subgroups 2019+2025 · district finance per its label · ACS 2022 · Data updated 2026-07-03methodology · data updates · CSV · report issue

SchoolScope scores and verdicts are our interpretation of public California Department of Education data — independent analysis, not an official rating. How we analyze · Request a correction