Pomona Unified
Armstrong Elementary
22750 Beaverhead Drive, Diamond Bar, CA 91765-1566
Summary
Armstrong Elementary is underperforming.
Only 47.4% of students are reading at grade level in Armstrong Elementary, and it is trending down.
Math is weaker at 29.3%; most students are not yet at grade level, and it is quickly trending down.
Proficiency Stats
| Current Reading Proficiency | 47.4% |
| Current Math Proficiency | 29.3% |
| Reading State Rank | 2025/4674 (57th percentile) |
| Math State Rank | 3041/4674 (35th percentile) |
Other Stats
| Student / Teacher Ratio | 19:1 |
| Student Enrollment | 251 |
School Website
Great Schools
Niche
Ed-Data
CAASPP2-Year Trends
2023 - 2025
Reading -6.9%•Math -10.5%
•Math -10.5%Showing school-level proficiency for the last three years
Reading Proficiency Scores
Race and ethnicity proficiency plus distribution of scores by grade.
Race and Ethnicity
Distribution of Scores by Grade
Math Proficiency Scores
Race and ethnicity proficiency plus distribution of scores by grade.
Race and Ethnicity
Distribution of Scores by Grade