Summary:
The three high schools in Gateway Unified serve grades 7–12: Central Valley High has 583 students in grades 9–12, Mountain Lakes High has 68 in grades 10–12, and Gateway Community Day has 12 in grades 7–12. The clearest difference is achievement: in 2025–2026, Central Valley’s proficiency was 62% in English language arts (ELA), 38% in math and 46% in science, while Mountain Lakes reported 0% in ELA and math. Against state results, Central Valley was 13 percentage points higher in ELA, 1 point lower in math and 10 points higher in science; Mountain Lakes was 49 points lower in ELA and 38 points lower in math. Gateway Community Day’s test-score results are suppressed, so its performance cannot be ranked from these figures. Overall, the reported results show a sharp divide between Central Valley and Mountain Lakes.
Central Valley stands out for achievement and graduation, while Mountain Lakes is lowest among the schools with reported scores. Central Valley graduated 96% of students, 8 points above the state rate; Mountain Lakes graduated 70%, 18 points below it. Dropout rates likewise differed: 1% at Central Valley and 15% at Mountain Lakes, compared with 8% statewide. Attendance is a concern across all three schools: chronic absenteeism was 26% at Central Valley, 93% at Mountain Lakes and 91% at Gateway Community Day, versus 18% statewide. SchoolDigger ranked Central Valley 552nd of 2,137 California schools (74th percentile, four stars) and Mountain Lakes 2,112th (1st percentile, zero stars) in 2025–2026.
Results fell at both schools with scores in both years: from 2024–2025 to 2025–2026, Central Valley’s ELA proficiency dropped 9 percentage points and math dropped 7; Mountain Lakes’ ELA fell from 18% to 0% and math from 6% to 0%. SchoolDigger’s rankings also shifted: Central Valley rose from the 79th percentile in 2023–2024 to the 86th in 2024–2025, then fell to the 74th; Mountain Lakes moved from the 7th to the 19th, then down to the 1st. School size and reported income measures offer context, not an explanation for these results: for school year 2024–2025, free/reduced lunch eligible students were 72% at Central Valley, 94% at Mountain Lakes and 75% at Gateway Community Day. Student-teacher ratios ranged from 4.8 at Gateway Community Day to 21.9 at Central Valley.
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