Sierra Elementary vs William Collier Elementary
A head-to-head comparison of two elementary schools in California, United States, 141 km apart, using official American 2025 data. The better value in each row is highlighted.
Sierra Elementary
Lancaster · Public elementary · Grades K–5
707 students
William Collier Elementary
Wildomar · Public elementary · Grades K–5
707 students
| Measure | Sierra Elementary Lancaster, California | William Collier Elementary Wildomar, California |
|---|---|---|
| Success Index (US) | 8 Lower 50% | 26 Lower 50% |
| State rank | #5603 of 5,693 | #3699 of 5,693 |
| National rank | #49872 of 50,301 | #41116 of 50,301 |
| Sector | Public | Public |
| Type | Elementary | Elementary |
| Year range | Grades K–5 | Grades K–5 |
| Students | 707 | 707 |
| Enrollment | 707 | 707 |
| Free/reduced-price lunch | 92.8% | 80.1% |
| Students per teacher | 23.6 | 24.4 |
| Reading proficiency | 24% | 41% |
| Math proficiency | 11% | 33% |
| city | Lancaster | Wildomar |
| state | California | California |
| Website | – | – |
The verdict
- •William Collier Elementary scores higher on the Success Index (US) (26.0 vs 8.1).
- •William Collier Elementary does better on math proficiency (33% vs 11%).
- •William Collier Elementary does better on reading proficiency (41% vs 24%).
- •William Collier Elementary does better on community advantage (fewer free/reduced-price lunch) (80.1% vs 92.8%).
- •Sierra Elementary does better on students per teacher (23.6 vs 24.4).
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 Sierra Elementary better than William Collier Elementary?
On the Success Index (US), William Collier Elementary ranks higher (26.0 vs 8.1 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 Sierra Elementary and William Collier Elementary?
About 141 km in a straight line, between Lancaster and Wildomar in California.
Which has the better Enrollment?
Sierra Elementary: 707. William Collier Elementary: 707. Students enrolled in the latest NCES directory year.
How do Sierra Elementary and William Collier Elementary rank in California?
Sierra Elementary is 5603rd of 5,693 and William Collier Elementary is 3699th of 5,693 among elementary schools in California on the 2025 Success Index (US).