Summary:
River Islands High is the only school listed in the River Islands High District, serving grades 9–12 and 512 students. Its 2025–26 results show a sharply uneven academic picture: English language arts (ELA) is above the state result, while science is well below it, making science the clearest concern.
There is no local top or bottom school to compare, so the state figures provide the key reference. In 2025–26, all-grades ELA at River Islands High was 56%, 7 points above California’s 49%; math was 30%, 8 points below the state’s 38%; and science was 19%, 17 points below the state’s 36%. The grade-11 results show that the ELA advantage does not carry through to that grade: ELA was 1 point below the state, math 2 points below, and science 19 points below. Completion and attendance indicators compare favorably: graduation was 100% versus 88% statewide, dropout was 0% versus 8%, and chronic absenteeism was 15% versus 18% in 2025–26.
Recent score trends are mixed, with the school’s gaps widening in every subject. From 2024–25 to 2025–26, ELA rose 3 points at River Islands High, while math fell 2 points and science fell 4; the school’s science gap with the state widened by 7 points. Its equal-weight average gap across the three subjects widened by about 3 points, from 4 points below the state to 6 points below. SchoolDigger’s ranking moved from 802nd of 2,162 schools, at the 63rd percentile, to 1,039th of 2,137, at the 51st percentile, while its rating remained 3 stars. The school reports an 18.5 student-teacher ratio and 38% free/reduced lunch eligible in 2024–25; these are contextual figures, not explanations for results. Because only one school is listed, a local school-to-school comparison is not possible.
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