Grizzly ChalleNGe Charter vs Los Osos Middle
A head-to-head comparison of two schools in California, United States, 8.1 km apart, using official American 2025 data. The better value in each row is highlighted.
Grizzly ChalleNGe Charter
San Luis Obispo · Charter high · Grades 10–12
241 students
Los Osos Middle
Los Osos · Public middle · Grades 6–8
494 students
| Measure | Grizzly ChalleNGe Charter San Luis Obispo, California | Los Osos Middle Los Osos, California |
|---|---|---|
| Success Index (US) | 12 Lower 50% | 63 Top 50% |
| State rank | #1295 of 1,343 | #269 of 1,334 |
| National rank | #16465 of 16,910 | #4846 of 15,369 |
| Sector | Charter | Public |
| Type | High | Middle |
| Year range | Grades 10–12 | Grades 6–8 |
| Students | 241 | 494 |
| Enrollment | 241 | 494 |
| Free/reduced-price lunch | 84.6% | 51.4% |
| Students per teacher | 17.2 | 19.0 |
| Reading proficiency | 17% | 69% |
| Math proficiency | 2.5% | 55% |
| city | San Luis Obispo | Los Osos |
| state | California | California |
| Website | – | – |
The verdict
- •Los Osos Middle scores higher on the Success Index (US) (62.9 vs 11.7).
- •Los Osos Middle does better on math proficiency (55% vs 2.5%).
- •Los Osos Middle does better on reading proficiency (69% vs 17%).
- •Los Osos Middle does better on community advantage (fewer free/reduced-price lunch) (51.4% vs 84.6%).
- •Grizzly ChalleNGe Charter does better on students per teacher (17.2 vs 19.0).
- •Los Osos Middle is the larger school with 494 students compared with 241.
- •Grizzly ChalleNGe Charter is a charter school while Los Osos Middle is a public school, so fees and admission rules differ.
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 Grizzly ChalleNGe Charter better than Los Osos Middle?
On the Success Index (US), Los Osos Middle ranks higher (62.9 vs 11.7 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 Grizzly ChalleNGe Charter and Los Osos Middle?
About 8.1 km in a straight line, between San Luis Obispo and Los Osos in California.
Which has the better Enrollment?
Grizzly ChalleNGe Charter: 241. Los Osos Middle: 494. Students enrolled in the latest NCES directory year.
How do Grizzly ChalleNGe Charter and Los Osos Middle rank in California?
Grizzly ChalleNGe Charter is 1295th of 1,343 and Los Osos Middle is 269th of 1,334 among high schools in California on the 2025 Success Index (US).