Independent charter school · Banta Unified · Lathrop, California

River Islands High

Lathrop · 9–12 · 512 students (2024–25)

16601 Riptide Way, 95330riacademies.net ↗(209) 717-6715

Near California in English (reading and writing) and math: 56% and 30% scored Proficient or Advanced in grade 11, spring 2026, against 57% and 32%.

Source

Source: California’s state tests (CAASPP), California Department of Education, spring 2026
Students: all students tested in grade 11: 164 in English, 174 in math
Comparison: California: CDE’s grade 11 rows for the whole state combined, weighted by students tested (our calculation; 414,559 in English and 413,523 in math tested).

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

How to enroll

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Common questions

How do I get in?

Ask River Islands how it admits students. Charter schools set their own enrollment steps and dates. Evidence ↓

How many students reached the top test level here?

In grade 11, spring 2026, 21% scored Advanced in English and 11% in math. 44% scored below the standard in English and 70% in math. Evidence ↓

How often do students miss school or get suspended?

15 in 100 students were chronically absent in 2025–26 (129 of 858), meaning they missed 10% or more of school days. 3.9% of students (34 of 875) were suspended at least once in 2025–26. Evidence ↓

Academic achievement

How did students here do on state tests?

Near California in both subjects.

State tests (CAASPP), grade 11, spring 2026

In grade 11, spring 2026, 56% scored Proficient or Advanced in English and 30% 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: 164 in English, 174 in math
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 · 164 tested

Advanced: 21%
Proficient: 35%
Below the standard: 44%

This school56%

California57%

56% Proficient or Advanced in grade 11.

Math

Grade 11 · spring 2026 · 174 tested

Advanced: 11%
Proficient: 19%
Below the standard: 70%

This school30%

California32%

30% 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 26 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?

Results in both subjects were similar to 2025. English went from 53% to 56% and math from 32% to 30%.

Our comparable history for these grades covers 2025 and 2026 only. More years are needed to show a longer trend.

English · top two levels · grade 11

202553%131 tested

→

202656%164 tested

This school

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

Math · top two levels · grade 11

202532%132 tested

→

202630%174 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	21%	35%	25%	19%	164
English, grade 11 · California	27%	30%	21%	22%	414,559
Math, grade 11 · This school	11%	19%	26%	44%	174
Math, grade 11 · California	16%	16%	20%	48%	413,523

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).

Grade 11 tests are one part of the picture.

Results since 20252 tested years shown

Chart and table: 2025–2026.

English top two levels, grade 11

This schoolCalifornia

0%50%100%20252026202656%57%

Math top two levels, grade 11

This schoolCalifornia

0%50%100%20252026202630%32%

In grade 11, the share at the state’s top two levels in English went from 53% in 2025 to 56% in 2026. In math, it went from 32% in 2025 to 30% in 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
2025	53% 131 tested	57% 432,651 tested
2026	56% 164 tested	57% 414,559 tested

Math · top two levels · grade 11
Year	This school	California
2025	32% 132 tested	30% 431,903 tested
2026	30% 174 tested	32% 413,523 tested

What you can do

Who can act on River Islands’ results?

The state has River Islands in targeted support; its own board decides its plan.

What has the state flagged?

The state named it because results were low for Hispanic or Latino students. This support comes with a school improvement plan, which must use approaches with evidence behind them. Ask the principal to see the school improvement plan.

Federal designation under the Every Student Succeeds Act, 2025–26. Source

Where is its yearly plan?

What its plan pays for ↓

Banta Unified authorized this charter; its current term ends June 30, 2027.

Authorizer from the California Department of Education’s charter term file; term from its Charter School Database, checked October 22, 2026. Source

Life at school

Where do students go after finishing high school here?

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

Do students finish prepared, and where do they go?

The state has listed River Islands High under its current school code only since August 2022. Graduation, college-going and UC admission results are reported by school code, so they start with this school’s first graduating class under it.

Ask the school

How did recent graduates do, and where did they enroll after high school?

What could my child study here?

AP courses the school is approved to teach

The College Board approved this school to teach 15 AP courses in 5 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
Sciences3
English2
History & Social Science5
World Languages & Cultures1

Every approved AP course15 courses in 5 subjects

Math & Computer Science 4

Calculus AB
Calculus BC
Computer Science A
Computer Science Principles

Sciences 3

Biology
Chemistry
Physics 1

English 2

English Language and Composition
English Literature and Composition

History & Social Science 5

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

World Languages & Cultures 1

Spanish Language and Culture

What other courses and pathways are on record?

College courses in high school (dual enrollment)

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

How often do students miss school or get suspended?

15 in 100 students were chronically absent in 2025–26. That means they missed 10% or more of school days. 3.9% of students were suspended at least once in 2025–26.

Source

Source: CDE chronic absenteeism and suspension files, 2025–26
Students: chronic absence: 129 of 858 students counted for it; suspension: 34 of 875 students enrolled during the year

Chronically absent, 2025–26

15 in 100This school

129 of 858 students were chronically absent, meaning they missed 10% or more of school days.

Suspensions, 2025–26

3.9%

of students were suspended at least once (34 of 875).

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

Ask families and staff yourselfWhat to ask the people at River Islands

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

Every learner

How do kids like mine do here?

Hispanic or Latino students scored well below the same group across California in English.

Student groups, grade 11, spring 2026

34% of Hispanic or Latino students scored Proficient or Advanced in English (grade 11, spring 2026), 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).

River IslandsSame group, California

Low-incomeEnglish · 73 tested48%Same group, California 49%
Low-incomeMath · 75 tested21%Same group, California 23%
Hispanic or LatinoEnglish · 59 tested34%Same group, California 49%
Hispanic or LatinoMath · 57 tested11%Same group, California 21%
AsianEnglish · 37 tested76%Same group, California 79%
AsianMath · 42 tested60%Same group, California 67%

Proficient or Advanced, grade 11, spring 2026.

Who are the students?

2025–26 · students counted

Asian31%
Hispanic or Latino28%
Filipino17%
Black or African American13%
White8%
American Indian or Alaska Native1%
Two or more races—
Pacific Islander—
Not reported—
Unallocated share2%

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. Source and comparisons: the full student mix below.

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

25% 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 · 11 of 44 English learners25%

Banta Unified · 25 of 5545%

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?

38%of students qualified for free or reduced-price meals in 2024–25, 194 of 512. California: 63%.

32teachers, 2024–25

8 yearsaverage experience, 2024–25

12%in their first year, 2024–25

Ask: What extra help is there in English for Hispanic or Latino students, and how does the school check that it works?

All group results, district comparisons and sources

Proficient or Advancedgrade 11 · spring 2026

Group and subject	Here	vs Banta Unified	vs California
Low-income · 73 tested in English, 75 in math
English	48%	—	−149%
Math	21%	—	−223%
Hispanic or Latino · 59 tested in English, 57 in math
English	34%	—	−1549%
Math	11%	—	−1021%
Asian · 37 tested in English, 42 in math
English	76%	—	−379%
Math	60%	—	−767%

Each gap is to the same group, grades and subject: in Banta Unified, and across California. No group that is behind across California does 10 or more points better here.

Black or African American, Filipino and White students and students with disabilities: fewer than 30 tested here. No published rate here for American Indian or Alaska Native, Pacific Islander, homeless and military-family students, students of two or more races, English learners 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
Asian	31%
Hispanic or Latino	28%
Filipino	17%
Black or African American	13%
White	8%
American Indian or Alaska Native	1%
Two or more races	—
Pacific Islander	—
Not reported	—

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.

In its own words

What does River Islands’s own plan commit to?

Its 2025–26 plan

The plan lists what the school commits to spend and measure.

$10.0 million

planned for 39 funded actions in 3 goals. That’s 88% of its $11.4 million general fund budget. These are planned amounts; the charter school reports what it spent in a later plan.

The 2025–26 plan in short

Source: the charter school’s yearly spending plan (Local Control and Accountability Plan, or LCAP, 77 pages), as posted to the California School Dashboard.

Where the money goes

Three actions take 60% of the money. The plan itself puts 56% of it toward staff.

Certificated Staff $4.0 million
Academies Facilities & Operations $1.1 million
Academies Contract Services $947,677
36 other actions

Reading, math and catch-up help

No action title in this plan names reading, math, catch-up help or English learners.

For high-need students

It plans $1.3 million in extra services for English learners, low-income students and foster youth. For 2024–25, it planned $730,818 and estimates it spent $669,799, $61,019 (8%) less than planned (our arithmetic).

Ask: Why did estimated spending on these services come in $61,019 under the 2024–25 plan, and where does that money go in 2025–26?

What changed

The total is $3.1 million (44%) higher than in the 2024–25 plan. The biggest change in dollars is Certificated Staff, which went from $2.8 million to $4.0 million.

Largest cuts

SPED Contract Services−⁠$93,385
Career Technical Education & Visual and Performing Arts Programs−⁠$85,000
Academic Counselors−⁠$51,262

Largest increases

Certificated Staff+⁠$1.2 million
Core and Supplement Curriculum; Program/license Subscriptions+⁠$449,100
Academies Facilities & Operations+⁠$387,477

New in the 2025–26 plan

Special Education Services Staff$186,975
Program Administrator$165,841

Ask: What did SPED Contract Services pay for, and what changes now that the 2025–26 plan gives it $93,385 less?

What its goals measure

Read these state results for this school as context for the goals they measure; results alone can’t show what the plan caused.

The test rows are schoolwide results for every grade the school tests; the source doesn’t list which grades. The headline at the top of this page covers grade 11 only: 56% in English and 30% in math, spring 2026.

What its goals measure: state results, 2024–25 and 2025–26
Measure	2024–25	2025–26	Change
Chronically absentGoal 3	14 in 100	15 in 100	1 more in 100
Suspended at least onceGoal 3	6.8%	3.9%	down 2.9 pts

Goals 1 and 2 aren’t shown because they track other measures.

Figures from CDE’s state test, chronic absence and suspension files. Test figures cover every grade the school tests (California tests grades 3–8 and 11), so they differ from a profile’s rated grades. Chronically absent means a student missed 10% or more of school days.

The plan’s own titles and amounts

Certificated Staff · $3,996,201
Academies Facilities & Operations · $1,068,061
Academies Contract Services · $947,677

The full plan3 goals, 10 measures and where the money goes

We calculate each action’s share of the plan by dividing its planned amount by the total of the plan’s funded actions ($10.0 million).

Where does the money go?

61% to Goal 2. Each box is one action, sized by its planned dollars and coloured by its change since last year’s plan. Tap a box to open its goal.

Change since the 2024–25 plan, same title

fell 25% or more
fell 10–25%
fell 2–10%
within 2%
grew 2–10%
grew 10–25%
grew 25% or more
new or renamed title
not compared: unconfirmed, or repeated across goals

Every goal, in the plan’s order

Goal 1River Islands Academies (RIA) will strategically, and transparently allocate resources based on their ability…$2.6 million26% of action budgets

“River Islands Academies (RIA) will strategically, and transparently allocate resources based on their ability to sustain dynamic teaching and learning and realize continuous improvement in all areas of our program” p. 13 ↗

9 funded actions · 2024–25 plan: $2.0 million (+⁠$606,551)

Largest funded actions

Academies Facilities & Operations$1.1 millionaction 1.2 · p. 36 ↗
Academies Contract Services$0.9 millionaction 1.3 · p. 36 ↗
Service Fees$0.3 millionaction 1.4 · p. 36 ↗
SPED Contract Services$0.2 millionaction 1.6 · p. 36 ↗
Recruitment & Marketingunder $0.1 millionaction 1.5 · p. 36 ↗

4 more funded actions in this goal

Professional Development and Coaching · action 1.8 · p. 36 ↗under $0.1 million
Conference & Travel · action 1.10 · p. 36 ↗under $0.1 million
Academies Communication Tools · action 1.7 · p. 36 ↗under $0.1 million
Management/ Training Program · action 1.9 · p. 36 ↗under $0.1 million

Changes from last year’s plan, same title

Academies Facilities & Operations+⁠$0.4 million$0.7 million → $1.1 million · p. 36 ↗
Academies Contract Services+⁠$243,755$703,922 → $947,677 · p. 36 ↗
SPED Contract Services−⁠$93,385$337,979 → $244,594 · p. 36 ↗

Every other line in this goal, against last year’s plan

Service Fees · $219,608 → $276,927 · p. 36 ↗+⁠$57,319
Recruitment & Marketing · $30,000 → $40,000 · p. 36 ↗+⁠$10,000
Professional Development and Coaching · $40,713 → $30,000 · p. 36 ↗−⁠$10,713
Conference & Travel · $5,250 · p. 36 ↗new or renamed
Academies Communication Tools · $1,000 → $3,971 · p. 36 ↗+⁠$2,971
Management/ Training Program · $3,877 · p. 36 ↗new or renamed

A reworded title counts as new.

How the plan measures it · 1 measure

None of these has an all-students line we can quote; the plan’s table lists them from p. 13 ↗.

Goal 2River Islands High School (RIHS) will develop, sustain and enhance quality instructional programs to raise…$6.1 million61% of action budgets

“River Islands High School (RIHS) will develop, sustain and enhance quality instructional programs to raise student achievement” p. 17 ↗

16 funded actions · 2024–25 plan: $3.8 million (+⁠$2.3 million)

Largest funded actions

Certificated Staff$4.0 millionaction 2.3 · p. 37 ↗
Core and Supplement Curriculum; Program/license Subscriptions$0.6 millionaction 2.6 · p. 37 ↗
Tide Time$0.4 millionaction 2.16 · p. 38 ↗ · marked as contributing to high-need services
School Technology (Student devices, Classroom, Teacher, Office & Campus)$0.3 millionaction 2.8 · p. 37 ↗
Special Education Services Staff$0.2 millionaction 2.17 · p. 38 ↗

11 more funded actions in this goal

Program Administrator · action 2.13 · p. 37 ↗ · marked as contributing to high-need services$0.2 million
Instructional Material & Supplies · action 2.15 · p. 37 ↗$0.2 million
Academic Counselors · action 2.14 · p. 37 ↗ · marked as contributing to high-need services$0.1 million
Paraprofessionals and Instructional Aides · action 2.4 · p. 37 ↗$0.1 million
Residents, Intern & Induction Programs · action 2.5 · p. 37 ↗under $0.1 million
Local Assessment Program · action 2.12 · p. 37 ↗under $0.1 million
Multiple Language Learner Services · action 2.9 · p. 37 ↗ · marked as contributing to high-need servicesunder $0.1 million
Student Schedule Software · action 2.11 · p. 37 ↗under $0.1 million
Conference and Workshop Expenses · action 2.2 · p. 36 ↗under $0.1 million
Release time expenses for Professional Development · action 2.10 · p. 37 ↗under $0.1 million
Support Personnel Training · action 2.7 · p. 37 ↗under $0.1 million

Changes from last year’s plan, same title

Certificated Staff+⁠$1.2 million$2.8 million → $4.0 million · p. 37 ↗
Core and Supplement Curriculum; Program/license Subscriptions+⁠$449,100$150,900 → $600,000 · p. 37 ↗
Tide Time+⁠$128,770$279,117 → $407,887 · p. 38 ↗

Every other line in this goal, against last year’s plan

School Technology (Student devices, Classroom, Teacher, Office & Campus) · $200,000 → $300,000 · p. 37 ↗+⁠$100,000
Special Education Services Staff · $186,975 · p. 38 ↗new or renamed
Program Administrator · $165,841 · p. 37 ↗new or renamed
Instructional Material & Supplies · $103,000 → $150,000 · p. 37 ↗+⁠$47,000
Academic Counselors · $188,664 → $137,402 · p. 37 ↗−⁠$51,262
Paraprofessionals and Instructional Aides · $81,881 → $89,952 · p. 37 ↗+⁠$8,071
Residents, Intern & Induction Programs · $46,280 → $41,720 · p. 37 ↗−⁠$4,560
Local Assessment Program · $8,590 · p. 37 ↗new or renamed
Multiple Language Learner Services · $8,000 → $8,000 · p. 37 ↗unchanged
Student Schedule Software · $3,000 → $5,350 · p. 37 ↗+⁠$2,350
Conference and Workshop Expenses · $5,000 → $5,000 · p. 36 ↗unchanged
Release time expenses for Professional Development · $1,500 → $1,500 · p. 37 ↗unchanged
Support Personnel Training · $500 → $500 · p. 37 ↗unchanged

A reworded title counts as new.

How the plan measures it · 5 measures

None of these has an all-students line we can quote; the plan’s table lists them from p. 17 ↗.

Goal 3River Islands High School (RIHS) will provide a safe and welcoming learning environment that fosters a…$1.3 million13% of action budgets

“River Islands High School (RIHS) will provide a safe and welcoming learning environment that fosters a respectful and collaborative culture for students, parents, and staff” p. 25 ↗

14 funded actions · 2024–25 plan: $1.1 million (+⁠$196,653)

Largest funded actions

Classified Staff$558,446action 3.14 · p. 38 ↗ · marked as contributing to high-need services
Enrichment Programs$338,500action 3.3 · p. 38 ↗
Career Technical Education & Visual and Performing Arts Programs$300,000action 3.12 · p. 38 ↗
Emergency Communication Tools & Safety Equipment$41,100action 3.6 · p. 38 ↗
Post Secondary Planning & Programming$30,000action 3.4 · p. 38 ↗

9 more funded actions in this goal

Virtual Student management system · action 3.13 · p. 38 ↗$8,000
Attendance Support · action 3.16 · p. 39 ↗ · marked as contributing to high-need services$6,227
Student Character Program · action 3.1 · p. 38 ↗$5,000
School Check In System · action 3.9 · p. 38 ↗$2,500
Student Awards and Recognition · action 3.8 · p. 38 ↗$1,500
Community Support Training, Resources, and Engagement · action 3.15 · p. 39 ↗$1,000
Office Staff Professional Development · action 3.2 · p. 38 ↗$500
Parent Volunteer Appreciation/ Staff Appreciation · action 3.7 · p. 38 ↗$500
Student Incentives · action 3.11 · p. 38 ↗$500

Changes from last year’s plan, same title

Classified Staff+⁠$201,426$357,020 → $558,446 · p. 38 ↗
Career Technical Education & Visual and Performing Arts Programs−⁠$85,000$385,000 → $300,000 · p. 38 ↗
Enrichment Programs+⁠$63,500$275,000 → $338,500 · p. 38 ↗

Every other line in this goal, against last year’s plan

Emergency Communication Tools & Safety Equipment · $10,000 → $41,100 · p. 38 ↗+⁠$31,100
Post Secondary Planning & Programming · $43,000 → $30,000 · p. 38 ↗−⁠$13,000
Virtual Student management system · $8,000 → $8,000 · p. 38 ↗unchanged
Attendance Support · $4,800 → $6,227 · p. 39 ↗+⁠$1,427
Student Character Program · $10,000 → $5,000 · p. 38 ↗−⁠$5,000
School Check In System · $700 → $2,500 · p. 38 ↗+⁠$1,800
Student Awards and Recognition · $1,100 → $1,500 · p. 38 ↗+⁠$400
Community Support Training, Resources, and Engagement · $1,000 → $1,000 · p. 39 ↗unchanged
Office Staff Professional Development · $500 → $500 · p. 38 ↗unchanged
Parent Volunteer Appreciation/ Staff Appreciation · $500 → $500 · p. 38 ↗unchanged
Student Incentives · $500 → $500 · p. 38 ↗unchanged

How the plan measures it · 4 measures

None of these has an all-students line we can quote; the plan’s table lists them from p. 25 ↗.

All amounts are planned. We read them from the PDF and added up each goal’s actions ourselves. Page links open the plan at that page.

Next steps

How do I get in?

Ask River Islands how it admits students. Charter schools set their own enrollment steps and dates.

Before you apply

Confirm this school’s current process directly.

Eligibility and entry grades: Which grades are accepting applications, and who is eligible?
Application and lottery: What are the deadlines, enrollment priorities, and lottery or waitlist steps?
The daily logistics: What transportation and before- or after-school options are available?

School website: riacademies.net ↗Office: (209) 717-6715Administrator: Carey Simoni

Location and visiting

Get directions

16601 Riptide Way, Lathrop 95330

Directory location · Explore nearby schools on the map. Confirm enrollment with the school.

Questions for your visit

How much of each day do English learners spend learning English, and how do families see their progress? 25% 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 (11 of 44 students); California: 47%
What extra help do students who are behind get, and how do you know it’s working? 70% in math scored at the Developing or Minimal level, grade 11, spring 2026 (174 students tested); California: 68%
When a child starts missing school, who calls the family, and how soon?
Why did estimated spending on these services come in $61,019 under the 2024–25 plan, and where does that money go in 2025–26?
What did SPED Contract Services pay for, and what changes now that the 2025–26 plan gives it $93,385 less?
Which courses and career pathways does the school run, and who can enroll?

Office (209) 717-671516601 Riptide Way, 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

Lathrop HighManteca Unified · 1.5 mi
52ndSolidScope Score 56
East Union HighManteca Unified · 2.2 mi
30thDevelopingScope Score 50
Sierra HighManteca Unified · 2.7 mi
66thSolidScope Score 62

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.

2025 CDE CCI overall Prepared: no exact school row in the verified 2025 source.

Scope Score by year2024–25 · each year’s inputs, and the score for each year we could verify

The 2024–25 Scope Score uses the state’s college-or-career readiness measure, 2024–25, and is not published for this school. No verified earlier Scope Scores are available here.

School year	Chronic absence	Suspension
2024–25	14 in 100	6.8% (37 of 548)

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

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	164	21%	35%	25%	19%	56%	57%	−1

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	174	11%	19%	26%	44%	30%	32%	−2

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.

CDE assessment recordsCDE CAASPP 2026 · every level, as published · raw grade–subject rows

CDE CAASPP test year 2026 · all-students reporting group · publisher grade–subject records.
Grade · subject	Students tested with scores	Proficient or Advanced	Advanced	Proficient	Developing level	Minimal	Mean scale score
Grade 11 · ELA · 2026	164	56.1%	21.34%	34.76%	25%	18.9%	2591.4
All Grades · ELA · 2026	164	56.1%	21.34%	34.76%	25%	18.9%	not on file
Grade 11 · Math · 2026	174	29.89%	10.92%	18.97%	26.44%	43.68%	2577.7
All Grades · Math · 2026	174	29.89%	10.92%	18.97%	26.44%	43.68%	not on file

Every tested year2025–2026 · 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	164	21%	56%
2026 · Math	174	11%	30%
2025 · English	131	18%	53%
2025 · Math	132	13%	32%

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	131	53%
2025 · Grade 11 · Math	132	32%

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	165	2%	17%	65%	16%

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	73	48%	—	−1
Hispanic or Latino	59	34%	—	−15
Asian	37	76%	—	−3

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 · 14 in 100 → 2025–26 · 15 in 100 · +1 in 100
Suspension rate2024–25 · 6.8% (37 of 548) → 2025–26 · 3.9% (34 of 875) · −2.9 percentage points

Group	2018–19	2025–26	Change
Female	—	16 in 100	—
Male	—	14 in 100	—
Asian	—	8 in 100	—
Black or African American	—	23 in 100	—
Filipino	—	9 in 100	—
Hispanic or Latino	—	24 in 100	—
American Indian or Alaska Native	—	0 in 100	—
White	—	14 in 100	—
Students with disabilities	—	26 in 100	—
English learners	—	23 in 100	—
Low-income	—	22 in 100	—
All students	—	15 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
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.

SchoolScope withholds the high-school score and rank because a verified CDE overall Prepared rate is unavailable. A blank or missing rate is not 0%. 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.

English proficiency (ELPAC)

Measure	School	California reference
Level 4	14%49 English learners tested	18%8,212 reporting public schools

2025–26 · English learners · All grades. California reference: equal-school average across reporting public schools in SchoolScope at all grade levels; not student weighted. The tested count is reported separately from the percentage. Source: CDE Summative ELPAC research files.

AP route, among those ready for college or career

Unavailable

CDE CCI cohort · AP pathway share not reported; course offerings unknown

AP course catalog2025–26 · College Board course authorizations

Subject	Authorization recorded for
Biology	this school
Calculus AB	this school
Calculus BC	this school
Chemistry	this school
Computer Science A	this school
Computer Science Principles	this school
English Language and Composition	this school
English Literature and Composition	this school
Macroeconomics	this school
Physics 1	this school
Psychology	this school
Spanish Language and Culture	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	1
AP enrollment (male/female)	31
IB participation	not reported
Dual enrollment	offered · 9 enrolled
Algebra I in grade 8	not reported
Calculus sections	0
Physics sections	0
Chemistry sections	5
Reported male/female enrollment (CRDC)	276

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.

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

District current expense · FY 2024–25$33,047 per ADA

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

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

Instruction 52%Instruction support 13%Student services 11%Administration 15%Buildings & maintenance 9%

The arithmetic behind these shares · FY 2024–25
Group	Dollars	Share, to two decimals	Printed
Instruction	$3,524,504	52.21%	52%
Instruction support	$897,672	13.30%	13%
Student services	$722,662	10.70%	11%
Administration	$1,030,868	15.27%	15%
Buildings & maintenance	$572,338	8.48%	9%
Total	$6,750,733	100.00%	100%

These shares are our arithmetic: each group’s dollars divided by the $6,750,733 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.

Source: NCES F-33 · Full district breakdown →

The surrounding ZIP codeCensus Bureau survey, 2020–2024 · ZIP 95330 · not the school’s students

American Community Survey 5-year estimates · 2020–2024 · ZIP 95330 area
Measure	Estimate
Median household income	$125,421
Bachelor's degree or higher (adults 25+)	28%
ZIP-area population	35,395
Median age	33.8 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 95330 →

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

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No 2025 SchoolScope score, band or rank is published under this high-school source rule.

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 · AP courses the College Board approved, 2025–26 (approved to teach, not enrollment) · federal civil rights data (CRDC) 2023–24, a past snapshot · Data updated October 15, 2026

How we analyze · Request a correction

River Islands High

Common questions

How do I get in?

How many students reached the top test level here?

How often do students miss school or get suspended?

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 River Islands’ results?

What has the state flagged?

Where is its yearly plan?

Where do students go after finishing high school here?

Do students finish prepared, and where do they go?

What could my child study here?

AP courses the school is approved to teach

Math & Computer Science 4

Sciences 3

English 2

History & Social Science 5

World Languages & Cultures 1

What other courses and pathways are on record?

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?

What does River Islands’s own plan commit to?

The 2025–26 plan in short

Where the money goes

Reading, math and catch-up help

For high-need students

What changed

What its goals measure

Where does the money go?

Every goal, in the plan’s order

How do I get in?

Before you apply

Location and visiting

Questions for your visit

Source records

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