Elementary Schools in Diamond Bar, California: Diamond Bar students aren't just reaching proficiency — many go beyond it.
Diamond Bar, California has 7 ranked elementary schools with an average Scope Score of 60.8/100 — 22.0 points above the state average of 38.9. The highest-scoring school is Maple Hill Elementary at 76/100, where 60.6% of students exceed the state standard on the 2025 CAASPP assessment. Diamond Bar schools average 42.3% exceeded standard (state: 21.4%) — this exceeded-vs-met distinction shows how many students go beyond the standard rather than only meeting it. Of 7 schools, 2 Growth Engines and 2 High Ceiling stand out for their performance profiles. Chronic absenteeism averages 9.6% (below the state average of 17.9%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.
Start with your child’s school level
The overview describes elementary schools. The lists below separate elementary, middle and high schools, so each school’s standing stays within its own comparison group. Open a profile to see the underlying results, student support and questions to ask on a visit.
Every school in Diamond Bar
ranked by Scope Score · 2024–25 CAASPP · levels never mixed
Elementary Schools (7)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Maple Hill Elementary Walnut Valley Unified | 60.6% | 97th percentile · StrongScope Score 76/100 |
| 2 | Pantera Elementary Pomona Unified | 52.6% | 97th percentile · StrongScope Score 75/100 |
| 3 | Evergreen Elementary Walnut Valley Unified | 47.2% | 93rd percentile · StrongScope Score 69/100 |
| 4 | Quail Summit Elementary Walnut Valley Unified | 52.3% | 92nd percentile · StrongScope Score 67/100 |
| 5 | Castle Rock Elementary Walnut Valley Unified | 42.9% | 91st percentile · StrongScope Score 65/100 |
| 6 | Armstrong Elementary Pomona Unified | 21.4% | 57th percentile · SolidScope Score 39/100 |
| 7 | Golden Springs Elementary Pomona Unified | 18.7% | 48th percentile · DevelopingScope Score 35/100 |
Middle Schools (1)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Chaparral Middle Walnut Valley Unified | 58.3% | 99th percentile · StrongScope Score 85/100 |
High Schools (1)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Diamond Bar High Walnut Valley Unified | 46.3% | 96th percentile · StrongScope Score 82/100 |
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Data source: California Department of Education · CAASPP 2024-25 · Methodology
Scores are SchoolScope's analysis of public data, not official CDE ratings. They represent one way of interpreting test results and should not be the sole basis for school decisions.
Elementary school archetypes in Diamond Bar
Hidden gems: 2 schools in Diamond Bar are classified as Growth Engine (2) — showing positive growth trajectories that raw proficiency scores alone don't capture. These are schools where students leave with more than they arrived with.
Archetypes are data-driven labels based on Scope Score dimensions. Learn more
Private Schools in Diamond Bar
Private schools don't participate in California's standardized testing (CAASPP) and cannot be scored or ranked. Showing enrollment, student-teacher ratio, and affiliation where available.
Numbers tell you whether students are clearing the bar. A school visit tells you whether they're happy doing it. These metrics are intentionally missing from the Scope Score: class sizes and student-teacher interaction quality; arts, music, athletics, and enrichment programs; teacher experience and turnover; campus safety and social-emotional support; parent and community engagement; quality of special education and gifted programs; how school zones and enrollment boundaries affect access. Full methodology