River Islands High
High Schools (Public)Grades 9–12Charter SchoolActive
16601 Riptide Way, Lathrop, CA 95330
(209) 717-6715
Overall Score (2024-25)
↑ 14.5 ptsvs 2023-2448
out of 100
AverageTop 52% statewideData completeness: 60%
Academic Achievement63
CA avg
Academic Growth5
CA avg
School Climate72
CA avg
Score reflects percentile ranking among same-type schools. How is this calculated?
Test Scores (2024-25)
Percentage of students meeting or exceeding standards on CAASPP/CAST.
English Language Arts52.7%
CA avg 48.8%
Mathematics31.8%
CA avg 34.6%
Science / CAST (2024-25)23.5%
CA avg 32.7%
By Grade
| Grade | ELA % | Math % | Science % | Tested |
|---|---|---|---|---|
| 11 | 52.7% | 31.8% | 23.5% | 131 |
Enrollment & Demographics (2024-25)
512
Total Students
37.9%
Free/Reduced Lunch
6.8%
English Learners
Staff (2024-25)
18.4:1
Pupil-Teacher Ratio
Chronic Absenteeism (2024-25)
↑ 3.2%14.3%
Chronically Absent
544
Students Tracked
Historical Trends
Year-over-year performance data from official CDE records.
Composite Score
Science / CAST %
Chronic Absenteeism Rate %
Total Enrollment
Parent & Community Reviews
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Data sourced from the California Department of Education. CDS Code: 39773880141242. Academic Year: 2023-24 – 2024-25.