The brief
A charter high school in Lathrop, CA where students score 10 points below what's typical for similar communities.
River Islands High is a charter school: it enrolls by application rather than by address, so check its enrollment process directly before choosing a neighborhood for it.
- 202542%
About this school's data4 sources, 2019–2025
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, an estimate, or describes a surrounding area rather than the school, that limitation is named here.
- Based on limited data: 50% component coverage.
- We don't have enough verified data to rate this school fairly. This can happen when a school is very new, very small, or has limited test score reporting to the state. Our rating model requires at least 2 of 4 data components (academics, student progress, college readiness, and resources) to generate a meaningful score. Schools below this threshold receive a Limited Profile to avoid misleading ratings. Learn more about our methodology
Multi-year averages used by the rating model: math 32% (2025 CAASPP) · reading/ELA 53% (2025 CAASPP).
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- Math proficiency
- State department of education · 2025 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2025 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 95330; this does not measure the attendance area.
Evidence periods: Rating not displayed; assessments 2025 CAASPP; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.The area
- Median income
- $118,461
- Median home value
- $605,100
- Median rent
- $2,341/mo
- College educated
- 23.9%
- Homeownership
- 83.6%
- Poverty rate
- 8.5%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 95330; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 3
- Car-Dependent
- Bike Score
- 25
- Somewhat Bikeable
- City reported crime
- 1,268/100K
- Reported Part-1 offenses (violent + property + arson) per 100,000 residents, from the FBI Uniform Crime Reporting program for Lathrop. This is a city-level reported-crime measure, not a school safety rating.
Walk, transit and bike scores by
FBI Uniform Crime Reporting · 2025 · city context (Lathrop), not school-level safety or attendance eligibility. Source details
Source period: 2025. Freshness not available.
Compare nearby
Grade-compatible schools using the same rating model.- 5.9Compare →
- River Islands Highnot rated
Distance is proximity only; it is not attendance eligibility.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
The record
What is on file, and where each number came from.Questions families ask
What grades does River Islands High serve?
River Islands High serves students in grades 9th through 12th.
How many students attend River Islands High?
River Islands High has an enrollment of approximately 278 students.
What is the student-teacher ratio at River Islands High?
The student-teacher ratio at River Islands High is 18.5:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
What are the test scores at River Islands High?
Based on loaded state assessment records, River Islands High has 32% math proficiency (2025 CAASPP) and 53% reading/ELA proficiency (2025 CAASPP).
Is River Islands High a charter school?
Yes, River Islands High is a charter school. Charter schools are publicly funded but independently operated, often with more flexibility in curriculum and teaching methods.
Is River Islands High a Title I school?
No, River Islands High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for River Islands High?
42.8% of students at River Islands High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
School facts
- Grades
- 9th – 12th
- Enrollment
- 278
- Student-teacher ratio
- 18.5:1
- Teachers (FTE)
- 15
- Free or reduced lunch
- 42.8%
- Type
- Regular
- Title I
- No
- Setting
- Fringe Rural
- County
- San Joaquin County
- Phone
- (209) 717-6715
- Schools in district
- 1
- District spending per student
- $21,222
- NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- Not available
- The source release did not match this district identifier.
- Area population (ZIP 95330)
- 33,015
- Area average commute
- 43.6 min
- Area median age
- 34.2
NCES Common Core of Data (CCD) (SY 2023–24).
Sources and official links
Keep exploring
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Data from NCES Common Core of Data, California Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.