Best High Schools in Zip Code 94520

Zip code 94520 in Concord, California, is served by two high schools within the Mt. Diablo Unified district: the traditional Mt. Diablo High (grades 9-12) and the much smaller Glenbrook Academy (grades 6-12), which represent very different educational models for the area's students.

Mt. Diablo High is the primary comprehensive high school, with a graduation rate of 88.7% that exceeds the state average. However, its academic performance, particularly in math and science where proficiency is around 12%, is significantly below both district and state averages, and chronic absenteeism at 33.7% is a major concern. In contrast, Glenbrook Academy is a tiny alternative school with only 21 students; it operates with a very low student-teacher ratio and receives over four times the per-student funding, but reports a 100% chronic absenteeism rate and lacks standard academic performance data, suggesting it serves a specialized population.

For families, Mt. Diablo High provides the standard high school experience but faces clear challenges in academic achievement and student attendance. Glenbrook Academy appears to be a highly resourced, non-traditional option, but its extreme absenteeism and lack of reported outcomes make direct comparison difficult. Both schools serve a high percentage of economically disadvantaged students, highlighting the socioeconomic context of the area within the Mt. Diablo Unified district.