Summary:
ZIP code 91723 has two middle schools, both serving grades 6–8 in Covina-Valley Unified: Sierra Vista Middle and Traweek Middle. The clearest distinction for families is that Sierra Vista’s 2025–2026 proficiency results are higher in all three subjects, with the widest gap in math.
Sierra Vista stands out at the top: 56% of students were proficient in ELA, 50% in math and 38% in science, compared with 47%, 31% and 29% at Traweek. Those school-to-school gaps are 9 points in ELA, 19 in math and 9 in science. Sierra Vista was above state results in all three subjects; Traweek was below the state in all three. There are exceptions within the grade-level results: both schools were above the state in grade 7 ELA, at 62% for Sierra Vista and 53% for Traweek versus 51% statewide. In grade 8 math, Sierra Vista was near the state result, while Traweek was lower: 37% and 24%, respectively, compared with 36% statewide.
Results improved over the two years shown, but not evenly across schools. From 2024–2025 to 2025–2026, Sierra Vista rose 6 points in ELA, 12 in math and 13 in science; Traweek rose 3 points in ELA and 2 in math, but fell 2 points in science. SchoolDigger’s percentile rank also climbed for Sierra Vista, from 57 to 74 between 2023–2024 and 2025–2026, while Traweek’s went from 60 to 52. Context measures differ, too: in 2024–2025, free/reduced lunch eligible students made up 68% at Sierra Vista and 79% at Traweek; student-teacher ratios were 21.6 and 22.4. Chronic absenteeism in 2025–2026 was 20% at Sierra Vista and 18% at Traweek, so the higher-scoring school did not have the lower absenteeism rate.
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