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Email BoardWilliam Collier Elementary
20150 Mayhall Drive, Wildomar, CA 92595-8272
Summary
William Collier Elementary is badly underperforming.
Reading and math results average to the 28th percentile among comparable California schools.
Only 33.8% of students met California's reading standard, and it is trending down slightly.
Math is weaker: 26.4% of students met California's math standard, and it is trending down.
Proficiency stats
| Current Reading Proficiency | 33.8% |
| Current Math Proficiency | 26.4% |
| Reading State Rank | 3,292/4,657 (29th percentile) |
| Math State Rank | 3,369/4,657 (28th percentile) |
School information
| Student / Teacher Ratio | 22:1 |
| Student enrollment (2024–25) | 707 |
| Low-Income Students | 566 (80.1%) |
| English Learners | 82 (11.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 5.2 points from last year and fell 2.6 points over the full period. Math fell 5.6 points from last year and fell 5.8 points over the full period.
•Math -5.8 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Hispanic or Latino and Two or more races students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 32.9% to 35.2% across the grades shown. Overall, the school’s reading results rank No. 3,292 of 4,657 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 23.1-point reading income gap is slightly wider than the 19.8-point gap at a typical California K–5 school. It widened over the period shown.
•
English Learners vs English Native
15.0% of English learners meet the reading standard, compared with 30.0% of English-only students. The gap narrowed as English-learner results rose and English-only results fell.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Two or more races students have the strongest math results at about 28% proficiency. The other reported groups range from about 19% to 27%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 17.9% to 33.3% across the grades shown. Overall, the school’s math results rank No. 3,369 of 4,657 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 16.8-point math income gap is narrower than the 20.0-point gap at a typical California K–5 school. It widened over the period shown.
•English Learners vs English Native
21.1% of English learners meet the math standard, compared with 22.7% of English-only students. The gap narrowed as English-learner results rose and English-only results fell.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 1,832 schools for reading and 1,839 for math. The comparison uses 2026 California K–5 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does William Collier Elementary compare within the district?
William Collier Elementary is No. 9 in reading and No. 10 in math proficiency among the 13 K–5 schools in Lake Elsinore Unified with 2026 results.
Explore the district’s schoolsHow does William Collier Elementary rank in California?
William Collier Elementary ranks No. 3,292 of 4,657 in reading and No. 3,369 of 4,657 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at William Collier Elementary compare within the district?
Low-income students here rank No. 11 in reading and No. 10 in math among 13 K–5 district schools with reportable 2026 results for this group. 30.1% meet the reading standard and 23.7% meet the math standard.
See results by student groupHow does William Collier Elementary compare with other schools in Wildomar?
William Collier Elementary is No. 3 in reading and No. 4 in math proficiency among the 4 K–5 schools in Wildomar with 2026 results.
Explore schools in WildomarHow does William Collier Elementary compare with other schools in Riverside County?
William Collier Elementary is No. 102 in reading and No. 94 in math proficiency among the 160 K–5 schools in Riverside County with 2026 results.
Explore schools in Riverside CountyWhich schools should I compare?
Schools serving K–5 in the same district.
| School | Math | Reading |
|---|---|---|
| William Collier ElementaryThis school | 26.4% | 33.8% |
| Donald Graham Elementary | 33.8% | 39.3% |
| Ronald Reagan Elementary | 27.7% | 35.8% |
