Summary:
Castro Valley, California, has 15 schools: nine elementary, two middle, three high and one alternative school, serving students from elementary through high school. Across schools with reported results, 2025–26 averages were 63% in ELA, 59% in math and 53% in science, compared with California’s 49%, 38% and 36%; the average advantages were 14, 20 and 17 percentage points, respectively. These all-grades averages span different grade levels, so they are broad comparisons rather than exact school-to-school matches. The most important takeaway is that results vary widely: the gap between the lowest and highest school was 68 points in ELA, 81 in math and 65 in science.
Jensen Ranch Elementary leads the list in every subject, with 89% proficiency in ELA, 84% in math and 74% in science; its results are 40, 46 and 38 points above state rates. Proctor Elementary is another math standout at 83%, second among the schools. At middle school, Creekside Middle leads Canyon Middle in all three subjects and every tested grade; its grade-level advantages range from 11 to 14 points in ELA and 15 to 28 points in math. At the other end, Redwood Continuation High records 21% in ELA, 3% in math and 8% in science—all below state rates. In 11th grade, it trails Castro Valley High by 40 points in ELA, 40 in math and 40 in science.
Recent changes are mixed rather than uniformly upward: average school ELA results were nearly flat from 2024–25 to 2025–26, math dipped slightly, and science rose by 7 points. Vannoy Elementary illustrates the unevenness: science rose 30 points while ELA fell 8; Marshall Elementary saw science fall 14 points. SchoolDigger’s statewide percentile rankings also moved in different directions: Jensen Ranch rose from the 95th to the 99th percentile, while Palomares Elementary fell from the 80th to the 70th. The reported free/reduced lunch eligible measure for school year 2024–25 offers context, not an explanation for results: it was 20% at Jensen Ranch, 55% at Castro Valley Elementary and 36% at Palomares, whose ELA and science results were 48% and 69%.
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