Summary
Endeavour Middle in Lancaster, California, serves 805 students in grades 6–8 in the Antelope Valley. For 2025–2026, SchoolDigger ranked the school 2,560th out of 2,703 California schools, at the 5th percentile with 0 stars. The most important finding for families is that proficiency is below state and district rates in all three reported subjects.
Science is Endeavour’s relative strength, while ELA is its weakest subject compared with nearby full-span middle schools. In 2025–2026, 19% of students were proficient in ELA, 9% in math, and 13% in science. Those rates were below California’s by 30, 29, and 23 percentage points, respectively, and below Lancaster Elementary by 6, 6, and 4 points. The average among eight nearby schools serving grades 6–8 was 34% in ELA, 18% in math, and 20% in science—15, 9, and 8 points higher than Endeavour’s rates. Science has the smallest gap to both the state and nearby-school averages; ELA has the largest gap to the nearby average.
Results have improved unevenly: from 2022–2023 to 2025–2026, math and science proficiency each rose by about 4 percentage points, while ELA fell by about 4 points. Despite the gains, the state gap widened by 6 points in ELA and 2 in science, and narrowed by 1 point in math. Chronic absenteeism improved substantially, dropping from 45% in 2021–2022 to 24% in 2025–2026, though it remains above the state’s 18%. Endeavour’s student–teacher ratio is 20.3; 82% of students were free/reduced lunch eligible in 2024–2025, compared with a 79% average at nearby schools reporting the same measure and year. SchoolDigger placed Endeavour’s homeless-student results at the 22nd percentile in 2025–2026, above its overall 5th percentile. Its English Language Learner ranking was at the 23rd percentile in 2023–2024, after reaching the 47th percentile in 2022–2023.
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