High school (grades 9-12) · Lathrop, CA
River Islands High
Federal NCES profile for River Islands High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 0/100.
The verdict
River Islands High earns 0/100 on the Resource Investment Index, with class sizes larger than 99% of California schools. It is also more racially and ethnically mixed than most California schools.
- #7 of 8
- public schools in Lathrop · Resource Index
- 0
- Resource Index · Lower
- 56.9:1
- large classes for California
- 33.3%
- free-lunch eligible
River Islands High has class sizes larger than 99% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, River Islands High ranks #7 of 8 public schools in Lathrop, CA.
School address
NCES ID 060257414622 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+170 students YoY
River Islands High grew from 108 students in 2022-23 to 278 in 2023-24 (+157.4%).
Teacher FTE added 9.3 → 15.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+170 students YoY 060257414622 · Lathrop, CA High · MID · CHARTER
512 enr · 56.9:1 · 33.3% lunch · RII 0
Nearest enrollment peer: Fairview High School (512 students)
River Islands High grew from 108 students in 2022-23 to 278 in 2023-24 (+157.4%). Teacher FTE added 9.3 → 15.7 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
How River Islands High compares
River Islands High is a growing campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 56.9:1 | ▲ 165% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 33.3% | ▼ 40% | 55.5% | 51.7% |
| Enrollment | 512 | top 43% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Equity indicators methodology
Student demographics
Largest group: Asian at 47.9% of enrollment.
Simpson diversity index - at 66.2, River Islands High is more mixed than the California school average of 46.0.
District finance for River Islands High District reports $21,222 per pupil (NCES F-33) - open the district page for the full revenue mix.
Similar high schools in Lathrop
1 comparable high schools (grades 9-12) serving the same city.
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~512 students)
Frequently asked questions about River Islands High
How many students attend River Islands High?
River Islands High has 512 students enrolled. It is a high school in Lathrop, CA. CCD year-over-year: 108 (2022-23) → 278 (2023-24), up 170.
What is the student-teacher ratio at River Islands High?
The student-teacher ratio at River Islands High is 56.9:1, which is 165% higher than the California average of 21.5:1 and 262% higher than the national average of 15.7:1.
What percentage of students receive free lunch at River Islands High?
33.3% of students at River Islands High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of River Islands High?
The largest demographic group at River Islands High is Asian at 47.9% of enrollment, in Lathrop, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.2/100.
What is the Resource Investment Index for River Islands High?
River Islands High has a Resource Investment Index of 0/100 (lower reported resources relative to schools nationally) based on 1 factor: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology). Limited indicators were available, so the index reflects partial data.
How does River Islands High rank among public schools in Lathrop?
By Resource Investment Index, River Islands High ranks #7 of 8 public schools in Lathrop, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Lathrop on the city page.
What other schools are in River Islands High District?
None; River Islands High District is a single-school charter district, and River Islands High is its only campus.