Summary:
Zip code 91773 has 15 schools: eight elementary, two middle, three high and two alternative schools, including a continuation school. Most are in Bonita Unified; Blue Ridge Academy is in a separate district. The latest scores for the 12 conventional Bonita Unified schools are from 2025–26, and their average results are above statewide figures in ELA, math and science. The key takeaway is that conventional schools generally outperform the state, while results—especially among elementary schools—vary considerably by school.
At the elementary level, Arma J. Shull Elementary leads in ELA and science, with 77% and 69% proficient; Grace Miller Elementary leads in math at 80%. At the other end, Fred Ekstrand Elementary has the lowest elementary ELA and math results, at 57% and 55%, while J. Marion Roynon Elementary has the lowest science result, at 41%. Among middle schools, Ramona Middle leads Lone Hill Middle in math by 11 points; their science scores are nearly tied. Bonita High leads San Dimas High in all three subjects, most notably math, by 18 points. The alternative and continuation schools have different profiles: Chaparral High (Continuation) scores 10% in ELA and 0% in math, while Vista (Alternative) reports only science, at 23%.
Across the same 12 conventional schools, average science results rose 4 points from 2024–25 to 2025–26, math rose 1 point, and ELA fell 1 point. Individual schools moved differently: Gladstone Elementary science rose 18 points, while J. Marion Roynon Elementary science fell 14; ELA rose 8 points at Allen Avenue Elementary and fell 6 at Oak Mesa Elementary. San Dimas High’s SchoolDigger statewide percentile rose from 86 to 92, while Chaparral High (Continuation) fell from 22 to 4. School characteristics offer context, not a simple explanation of results: Shull has a 27.7 student-teacher ratio, compared with 21.5 at Fred Ekstrand. In 2024–25, free/reduced lunch eligibility was 42% at Grace Miller and 48% at Fred Ekstrand, despite their different math results.
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