Summary:
Schools in Byron Union Elementary include four schools serving kindergarten through eighth grade: two K–5 elementary schools, a 6–8 middle school, and a small K–8 independent-study school. In 2025–26, equal-weight school averages were 44% in English language arts (ELA), 40% in math, and 35% in science, compared with California’s 49%, 38%, and 36%. The clearest area-wide finding is that Discovery Bay Elementary has the strongest broad academic profile: it leads in ELA and math and is above the state in all three reported subjects.
Discovery Bay Elementary scored 61% in both ELA and math, respectively 12 and 23 points above California. Excelsior Middle had the lowest math result, 30%, and the lowest reported science result, 26%; it was below the state by 6 points in ELA, 9 in math, and 10 in science. Byron Institute for Independent Study had the lowest ELA result, 27%, or 22 points below California. In science, Timber Point Elementary led at 40.0%, just above Discovery Bay at 39.7%, and was 4 points above the state. The Institute’s science result is unavailable, so it cannot be placed in that ranking.
Recent changes are mixed: Discovery Bay’s ELA fell 7 points and science fell 11, while its math slipped by less than 1. Excelsior declined in all three subjects—6 points in ELA, 5 in math, and 7 in science. Timber Point’s science rose 6 points, even as its math fell 5; the Institute improved 14 points in ELA and 9 in math, though its latest ELA remains the group’s lowest. SchoolDigger’s statewide rankings put Discovery Bay at the 79th percentile, ahead of Timber Point at the 56th and Excelsior at the 46th. Both elementary schools report free/reduced lunch eligibility for 2024–25: 41% at Discovery Bay and 26% at Timber Point, a 15-point difference; Discovery Bay’s student-teacher ratio is 21.4, compared with 24.6 at Timber Point. These are useful points of comparison, not explanations for the different results.
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