# Armstrong Elementary

Armstrong Elementary is an elementary school in Diamond Bar, California. Reading proficiency is 47.4%, -6.9 points from 2023 to 2025. Math proficiency is 29.3%, -10.5 points from 2023 to 2025.

## Key Stats

| Metric | Value |
| --- | --- |
| Canonical URL | https://caschooltrends.com/schools/armstrong-elementary-diamond-bar |
| District | Pomona Unified |
| Address | 22750 Beaverhead Drive, Diamond Bar, CA, 91765-1566 |
| Grade span | K-6 |
| Charter status | Non-charter |
| Enrollment | N/A |
| Student / teacher ratio | 19:1 |
| Per-student spending | $22,531 |
| Low-Income Students | 165 (67.3%) |
| English Learners | 26 (10.6%) |

## Reading Proficiency History

| Year | Proficient % | Tested Students |
| --- | --- | --- |
| 2023 | 54.3% | 127 |
| 2024 | 50.4% | 127 |
| 2025 | 47.4% | 116 |

## Math Proficiency History

| Year | Proficient % | Tested Students |
| --- | --- | --- |
| 2023 | 39.8% | 128 |
| 2024 | 40.9% | 127 |
| 2025 | 29.3% | 116 |

## Reading Performance by Income Group

| Year | Low-Income | Non-Low-Income |
| --- | --- | --- |
| 2023 | 48.9% | 68.6% |
| 2024 | 47.4% | 60.0% |
| 2025 | 43.9% | 55.9% |

## Math Performance by Income Group

| Year | Low-Income | Non-Low-Income |
| --- | --- | --- |
| 2023 | 32.3% | 60.0% |
| 2024 | 37.8% | 51.7% |
| 2025 | 24.4% | 41.2% |

## Reading Performance by English Learner Status

| Year | English Learners | English Native |
| --- | --- | --- |
| 2023 | 20.0% | 59.2% |
| 2024 | 16.7% | 54.3% |
| 2025 | N/A | 50.5% |

## Math Performance by English Learner Status

| Year | English Learners | English Native |
| --- | --- | --- |
| 2023 | 12.5% | 43.9% |
| 2024 | 23.1% | 41.9% |
| 2025 | N/A | 26.4% |

## Reading Performance by Race and Ethnicity

| Group | Proficient % | Tested Students |
| --- | --- | --- |
| Hispanic or Latino | 40.0% | 70 |
| White | 66.7% | 12 |
| Two or more races | 36.4% | 11 |

## Math Performance by Race and Ethnicity

| Group | Proficient % | Tested Students |
| --- | --- | --- |
| Hispanic or Latino | 17.1% | 70 |
| White | 25.0% | 12 |
| Two or more races | 27.3% | 11 |

## Reading Score Distribution by Grade

| Grade | Tested Students | Not Met | Nearly Met | Met | Exceeded |
| --- | --- | --- | --- | --- | --- |
| 3 | 29 | 34.5% | 27.6% | 6.9% | 31.0% |
| 4 | 37 | 37.8% | 21.6% | 16.2% | 24.3% |
| 5 | 25 | 16.0% | 16.0% | 36.0% | 32.0% |
| 6 | 25 | 24.0% | 28.0% | 36.0% | 12.0% |

## Math Score Distribution by Grade

| Grade | Tested Students | Not Met | Nearly Met | Met | Exceeded |
| --- | --- | --- | --- | --- | --- |
| 3 | 29 | 34.5% | 27.6% | 27.6% | 10.3% |
| 4 | 37 | 43.2% | 37.8% | 8.1% | 10.8% |
| 5 | 25 | 40.0% | 24.0% | 16.0% | 20.0% |
| 6 | 25 | 36.0% | 36.0% | 24.0% | 4.0% |