What We Evaluated
| 👨🏫 Class Size | 20.8:1 student-teacher ratio |
| 💰 Funding | $21,992 per student |
| 🏫 School Type | Regular |
School Information
| Address | 22750 Beaverhead Dr. |
| City | Diamond Bar |
| ZIP Code | 91765 |
| District | 0631320 |
| NCES School ID | 063132004836 |
| Data Year | 2024-25 |
Community Context for 91765
Understanding the community around Armstrong Elementary helps evaluate the school environment and neighborhood.
💰 Income & Economy
| Median Household Income | $105,712 |
| Per Capita Income | $46,501 |
| Poverty Rate | 7.3% |
| Households Earning $100K+ | 51.8% |
🎓 Education Level
| Bachelor's Degree or Higher | 52.5% |
| High School or Higher | 92.7% |
🏠 Housing
| Median Home Value | $839,700 |
| Median Rent | $2,310 |
| Owner-Occupied | 77.1% |
| Renter-Occupied | 22.9% |
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Student Demographics
Enrollment and demographic breakdown for Armstrong Elementary.
👫 Gender Distribution
🌎 Race & Ethnicity
📋 Enrollment Summary
| Total Enrollment | 249 |
| Teachers (FTE) | 12.0 |
| Student:Teacher Ratio | 20.8:1 |
Frequently Asked Questions
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Other Schools in 91765
About Repit School Scores
Traditional school ratings rely heavily on standardized test scores, which often reflect family income more than actual school quality. Repit takes a different approach.
We evaluate schools based on factors that research shows actually impact educational outcomes:
- Class Size — Smaller classes mean more individual attention and better student outcomes.
- School Funding — Resources available for programs, teachers, and facilities directly affect education quality.
- School Environment — School size and structure affect available programs and student experience.
Data source: NCES CCD 2024-25 | Last updated: September 2026