Ada W. Harris Elementary vs JCS - Mountain Oaks
A head-to-head comparison of two elementary schools in California, United States, 1.7 km apart, using official American 2025 data. The better value in each row is highlighted.
Ada W. Harris Elementary
Cardiff-by-the-Sea · Public elementary · Grades 3–6
382 students
JCS - Mountain Oaks
Encinitas · Charter elementary · Grades K–8
255 students
| Measure | Ada W. Harris Elementary Cardiff-by-the-Sea, California | JCS - Mountain Oaks Encinitas, California |
|---|---|---|
| Success Index (US) | 77 Top 25% | 78 Top 25% |
| State rank | #439 of 5,693 | #396 of 5,693 |
| National rank | #6677 of 50,301 | #6250 of 50,301 |
| Sector | Public | Charter |
| Type | Elementary | Elementary |
| Year range | Grades 3–6 | Grades K–8 |
| Students | 382 | 255 |
| Enrollment | 382 | 255 |
| Free/reduced-price lunch | 11% | 25.9% |
| Students per teacher | 22.5 | 17.0 |
| Reading proficiency | 74% | 75% |
| Math proficiency | 71% | 70% |
| city | Cardiff-by-the-Sea | Encinitas |
| state | California | California |
| Website | – | – |
The verdict
- •Both schools have almost identical Success Index (US) scores (77.0 vs 77.8).
- •Ada W. Harris Elementary does better on math proficiency (71% vs 70%).
- •JCS - Mountain Oaks does better on reading proficiency (75% vs 74%).
- •Ada W. Harris Elementary does better on community advantage (fewer free/reduced-price lunch) (11% vs 25.9%).
- •JCS - Mountain Oaks does better on students per teacher (17.0 vs 22.5).
- •Ada W. Harris Elementary is the larger school with 382 students compared with 255.
- •Ada W. Harris Elementary is a public school while JCS - Mountain Oaks is a charter 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 Ada W. Harris Elementary better than JCS - Mountain Oaks?
The two schools are very close on the Success Index (US). Differences in sector, size, programmes and distance from home will matter more than the score.
How far apart are Ada W. Harris Elementary and JCS - Mountain Oaks?
About 1.7 km in a straight line, between Cardiff-by-the-Sea and Encinitas in California.
Which has the better Enrollment?
Ada W. Harris Elementary: 382. JCS - Mountain Oaks: 255. Students enrolled in the latest NCES directory year.
How do Ada W. Harris Elementary and JCS - Mountain Oaks rank in California?
Ada W. Harris Elementary is 439th of 5,693 and JCS - Mountain Oaks is 396th of 5,693 among elementary schools in California on the 2025 Success Index (US).