Summary:
ZIP code 91723 has six Covina-Valley Unified schools: two elementary, two middle and two high schools. In 2025–2026, their average proficiency was 55% in English language arts (ELA) and 42% in math, both above state averages of 49% and 38%; the group averaged 33% in science, below the state’s 36%. The main finding is that these overall averages mask sizable differences: the gap between the highest- and lowest-scoring schools was 20 points in ELA, 26 in math and 20 in science.
Different schools lead in different subjects. Covina High had the top ELA result at 63%, while Cypress Elementary had the lowest at 43%. Barranca Elementary led in math at 57% and science at 38%; Traweek Middle had the lowest math result at 31%, and Cypress the lowest science result at 19%. Among the middle schools, Sierra Vista Middle outscored Traweek in all three subjects and was above the state in each, while Traweek was below the state in all three. High-school completion results were strong: Covina’s graduation rate was 98% and South Hills High’s was 97%, compared with 88% statewide.
Math proficiency rose at all six schools from 2024–2025 to 2025–2026, including 13 points at Covina and 12 at Sierra Vista. ELA fell at South Hills and Cypress; science fell at Traweek and by 16 points at Cypress, while Sierra Vista science rose 13 points. Elementary results also differ by grade: Cypress topped Barranca in grade 4 ELA, 62% to 49%, and math, 52% to 48%, though Barranca led in the other reported elementary ELA and math comparisons. For context, all six schools reported free/reduced lunch eligible figures for 2024–2025; the shares were 75% at Barranca and 79% at Cypress, and 68% at Sierra Vista versus 79% at Traweek. SchoolDigger’s statewide rank percentile rose 17 points for Sierra Vista and 14 for Covina over three years. All-grades comparisons cover schools serving different grade spans.
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