Summary:
The Alpha: Cornerstone Academy Preparatory District has one school: Alpha: Cornerstone Academy Preparatory, a K–8 school with 554 students. In 2025–2026, the school was above California’s results in all three reported subjects: 64% proficient in English language arts/literacy (ELA) versus 49% statewide, 54% in math versus 38%, and 56% in science versus 36%. Its largest advantage was in science, at 20 percentage points—the clearest overall strength in the area.
Because only one school is listed, there is no local top or bottom school to compare; the school stands out relative to the state instead. Its lead was 15 percentage points in ELA, 16 in math, and 20 in science. The advantage also varied by grade: in ELA, it was narrowest in grade 4 at about 1 point and largest in grade 5 at 22 points; in math, it ranged from 5 points in grade 7 to 27 in grade 6. In science, the school was ahead by 14 points in grade 5 and 28 in grade 8. Chronic absenteeism was also lower than the state figure in 2025–2026: 8% at the school compared with 18% statewide.
Results improved from 2024–2025 to 2025–2026, and the school’s advantage over California widened in every subject, most in science. The school’s science proficiency rose from 45% to 56%, while its science lead over the state grew from 12 to 20 percentage points; the ELA and math leads each widened by about 3 and 2 points, respectively. SchoolDigger ranked the school 1,218th of 5,804 schools (79th percentile) in 2025–2026, similar to 1,220th of 5,857 (79th percentile) the prior year and 1,304th of 5,869 (78th percentile) in 2023–2024. The student–teacher ratio was 23 in 2024–2025. That year, 55% of students were free/reduced lunch eligible; California is a state where all students receive free meals (Community Eligibility). These are contextual details, not explanations for the school’s results.
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