Summary:
The seven schools in ZIP code 94564—five elementary schools, one middle school and one high school—enroll 3,518 students; elementary grade spans vary, with some schools serving through grade 8 and others ending at grade 6. In 2025–2026, the schools’ simple average proficiency rates were below the state average in ELA (44% versus 49%), math (37% versus 38%) and science (27% versus 36%). The clearest overall finding is that results vary widely by school, with the largest school-to-school spread in science.
West County Mandarin leads the all-grades results in every subject, at 64% in ELA, 62% in math and 51% in science. It is ahead of the next-highest school by 14 points in ELA, 16 in math and 9 in science. Ellerhorst Elementary is second in ELA and math, while Stewart Elementary is second in science. At the other end, Shannon Elementary has the lowest ELA and math results, at 28% and 26%; Pinole Valley High has the lowest science result, at 11%. The gaps between the highest and lowest schools are 36 points in ELA, 36 in math and 40 in science.
Recent changes are mixed: the average ELA result fell from 46% to 44% between 2024–2025 and 2025–2026, while the math average stayed at 37% when rounded; both averages fell further behind a rising state result. For the six schools with science results in both years, the average rose from 29% to 30%, but the state average rose from 33% to 36%. SchoolDigger’s 2025–2026 rankings place Mandarin at the 83rd percentile and Shannon at the 22nd; Pinole Middle improved from the 22nd to the 39th percentile since 2023–2024. Free/reduced lunch eligible shares for 2024–2025 range from 34% at Mandarin to 80% at Pinole Middle; these are context, not an explanation for results. Since schools serve different grade spans, all-grades comparisons are descriptive rather than perfectly like-for-like.
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