Summary
Eastside High is a public high school serving grades 9–12 in Lancaster, in the Antelope Valley, with 2,631 students in the Antelope Valley Union High district. Its latest reported graduation rate was 90%, above the district’s 85% and the state’s 88%, while chronic absenteeism was 28%, compared with 18% statewide. The central academic concern is that all three subject results are below state averages, with the widest gap in math: 7% proficiency, 31 points below the state.
Eastside’s clearest academic strength is ELA relative to nearby schools, while math is its weakest subject. In 2025–26, ELA proficiency was 36%, 6 points below the district and 14 below the state; among five nearby same-district schools with scores, only SOAR High (Students On Academic Rise) scored higher. Science proficiency was 9%, 5 points below the district and 27 below the state; among nearby schools with reported results, Eastside ranked second, behind Lancaster High. Math was 7%, below the district’s 16% and the state’s 38%, and behind SOAR, Lancaster and Antelope Valley High.
Eastside’s results have not kept pace with the state: from 2022–23 to 2025–26, the state gap widened from 12 to 14 points in ELA, 30 to 31 in math, and 20 to 27 in science. SchoolDigger ranked Eastside in the 25th percentile statewide in 2025–26, with one star. Its 2024–25 student-teacher ratio was 25.1, matching Lancaster’s, and 69% of students were free/reduced lunch eligible that year. One subgroup result stands out: SchoolDigger’s measure of how well Eastside serves Foster Care Students was at the 75th percentile in 2024–25, compared with the school’s overall 29th percentile; this comparison uses a small statewide pool and should be read cautiously.
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