Summary:
ZIP code 91355 has two public high schools serving grades 9–12, both in the William S. Hart Union High district. In 2025–2026, both schools’ all-grades proficiency results were above California’s in English language arts (ELA), math, and science; across the two schools, the averages were 89% in ELA, 69% in math, and 74% in science. The most important takeaway is that both schools are strong compared with the state, but their results differ substantially—especially in math.
Academy of the Canyons leads the two-school comparison in all three subjects, scoring 95% in ELA, 82% in math, and 82% in science. Its advantage over Valencia High is 12 percentage points in ELA, 27 points in math, and 17 points in science. Valencia, the lower-scoring school in each subject, still exceeds California’s results by 34 points in ELA, 17 in math, and 30 in science. Academy also reports a 100% graduation rate, compared with 98% at Valencia. SchoolDigger ranks Academy 13th of 2,137 schools (99th percentile) and Valencia 121st (94th percentile).
Recent changes vary by subject and school: from 2024–2025 to 2025–2026, Valencia’s science proficiency rose 9 points while its ELA result fell 1 point; Academy’s math rose 5 points and science rose 1 point, while its ELA fell 2 points. Across the three subjects, the schools’ average margin over the state widened by 1 point. SchoolDigger rankings show Academy moving from 78th in 2023–2024 to 13th in 2025–2026; Valencia’s latest rank improved from 143rd to 121st, but remained below its earlier 82nd-place rank. Academy is smaller, with 385 students versus Valencia’s 2,286, and has a higher 2024–2025 student-teacher ratio: 29.3 compared with 23.3. The schools’ 2024–2025 free/reduced lunch eligible shares were 15% at Academy and 13% at Valencia; these are context, not explanations for achievement differences.
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