Holbrook Language Academy vs Mt. Diablo High
A head-to-head comparison of two schools in California, United States, 1.4 km apart, using official American 2025 data. The better value in each row is highlighted.
Holbrook Language Academy
Concord · Public elementary · Grades K–8
501 students
Mt. Diablo High
Concord · Public high · Grades 9–12
1,397 students
| Measure | Holbrook Language Academy Concord, California | Mt. Diablo High Concord, California |
|---|---|---|
| Success Index (US) | 20 Lower 50% | 19 Lower 50% |
| State rank | #4328 of 5,693 | #1148 of 1,343 |
| National rank | #44595 of 50,301 | #15532 of 16,910 |
| Sector | Public | Public |
| Type | Elementary | High |
| Year range | Grades K–8 | Grades 9–12 |
| Students | 501 | 1,397 |
| Enrollment | 501 | 1,397 |
| Free/reduced-price lunch | 66.7% | 80% |
| Students per teacher | 26.4 | 20.0 |
| Reading proficiency | 22% | 36% |
| Math proficiency | 32% | 15% |
| city | Concord | Concord |
| state | California | California |
| Website | – | – |
The verdict
- •Holbrook Language Academy scores higher on the Success Index (US) (20.4 vs 18.5).
- •Holbrook Language Academy does better on math proficiency (32% vs 15%).
- •Mt. Diablo High does better on reading proficiency (36% vs 22%).
- •Holbrook Language Academy does better on community advantage (fewer free/reduced-price lunch) (66.7% vs 80%).
- •Mt. Diablo High does better on students per teacher (20.0 vs 26.4).
- •Mt. Diablo High is the larger school with 1,397 students compared with 501.
The Success Index (US) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Holbrook Language Academy better than Mt. Diablo High?
On the Success Index (US), Holbrook Language Academy ranks higher (20.4 vs 18.5 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Holbrook Language Academy and Mt. Diablo High?
About 1.4 km in a straight line, between Concord and Concord in California.
Which has the better Enrollment?
Holbrook Language Academy: 501. Mt. Diablo High: 1,397. Students enrolled in the latest NCES directory year.
How do Holbrook Language Academy and Mt. Diablo High rank in California?
Holbrook Language Academy is 4328th of 5,693 and Mt. Diablo High is 1148th of 1,343 among elementary schools in California on the 2025 Success Index (US).