Performance
Armstrong Elementary — Academic Performance
Standardised assessments, graduation outcomes and college-readiness metrics for Armstrong Elementary in Diamond Bar, California.
Headline Indicator
—
Data not yet captured
Science (CAST)
California Science Test, percentage meeting or exceeding the standard, 2025
CAASPP
24%
Met or exceeded the standard
2025
4%
Exceeded the standard
25
Students tested
| Grade | Met or exceeded | Exceeded | Tested |
|---|---|---|---|
| Grade 5 | 24% | 4% | 25 |
Source: test_scores, CAASPP science results for 2025. Percentages are of students with a reported score. Results for very small groups are suppressed by the state and show as -.
Results by Student Group
CAASPP 2025, percentage meeting or exceeding the standard for each reported student group
| Student group | English Language Arts | Mathematics | Science |
|---|---|---|---|
| All students | 47% 116 tested | 29% 116 tested | 24% 25 tested |
| Gender | |||
| Female | 58% 48 tested | 31% 48 tested | 18% 11 tested |
| Male | 40% 68 tested | 28% 68 tested | 29% 14 tested |
| Race and ethnicity | |||
| Hispanic or Latino | 40% 70 tested | 17% 70 tested | 8% 13 tested |
| White | 67% 12 tested | 25% 12 tested | - |
| Two or more races | 36% 11 tested | 27% 11 tested | - |
| Socioeconomic status | |||
| Economically disadvantaged | 44% 82 tested | 24% 82 tested | 12% 17 tested |
| Not economically disadvantaged | 56% 34 tested | 41% 34 tested | - |
| English learners | |||
| Ever an English learner | 19% 16 tested | 38% 16 tested | - |
| Never an English learner | 52% 100 tested | 28% 100 tested | 29% 21 tested |
| English only | 51% 91 tested | 26% 91 tested | 32% 19 tested |
| Disability | |||
| Students with disabilities | 13% 24 tested | 4% 24 tested | - |
| No reported disability | 57% 92 tested | 36% 92 tested | 23% 22 tested |
| Parent education | |||
| Parent high school graduate | 40% 20 tested | 20% 20 tested | - |
| Parent some college | 40% 43 tested | 23% 43 tested | - |
| Parent college graduate | 60% 30 tested | 33% 30 tested | - |
| Parent graduate school | 56% 16 tested | 50% 16 tested | - |
View 7 further student groups reported by the state
| Student group | English Language Arts | Mathematics | Science |
|---|---|---|---|
| Not armed forces family member | 47% 116 tested | 29% 116 tested | 24% 25 tested |
| Not migrant education | 47% 116 tested | 29% 116 tested | 24% 25 tested |
| Not foster youth | 49% 113 tested | 30% 113 tested | 24% 25 tested |
| Fluent English proficient and English only | 51% 108 tested | 30% 108 tested | 25% 24 tested |
| Not homeless | 46% 106 tested | 28% 106 tested | 25% 24 tested |
| Hispanic or Latino (Econ. Disadvantaged) | 40% 57 tested | 19% 57 tested | 9% 11 tested |
| Hispanic or Latino (Not Econ. Disadvantaged) | 38% 13 tested | 8% 13 tested | - |
Source: test_scores, CAASPP 2025 student group breakdown. Groups the state suppresses for privacy, or that are too small to report, show as - rather than zero. Groups overlap, so the figures do not sum to the all students row.
English Learner Proficiency (ELPAC)
English Language Proficiency Assessments for California, summative overall performance, 2025
2025
13%
Level 4, well developed
The level used towards reclassification
2025
33%
Level 3 or 4, moderately or well developed
24
English learners tested
| Grade | Tested | Level 1 | Level 2 | Level 3 | Level 4 | Level 3 or 4 |
|---|---|---|---|---|---|---|
| Kindergarten | 4 | - | - | - | - | - |
| Grade 1 | 5 | - | - | - | - | - |
| Grade 2 | 6 | - | - | - | - | - |
| Grade 4 | 4 | - | - | - | - | - |
Level 1 Minimally developed. Level 2 Somewhat developed. Level 3 Moderately developed. Level 4 Well developed.
View ELPAC by student group (11 groups)
| Student group | Tested | Level 1 | Level 2 | Level 3 | Level 4 | Level 3 or 4 |
|---|---|---|---|---|---|---|
| ELs enrolled 12 months or more | 23 | 26% | 39% | 22% | 13% | 35% |
| Economically Disadvantaged | 20 | 30% | 45% | 20% | 5% | 25% |
| No Special Education Services | 20 | 30% | 30% | 25% | 15% | 40% |
| Primary language: Spanish | 18 | 33% | 39% | 22% | 6% | 28% |
| Hispanic or Latino | 17 | 29% | 41% | 24% | 6% | 29% |
| Male | 14 | 36% | 36% | 21% | 7% | 29% |
| Female | 10 | - | - | - | - | - |
| EL - 1 year in program | 8 | - | - | - | - | - |
| EL - 2 years in program | 8 | - | - | - | - | - |
| Not Economically Disadvantaged | 4 | - | - | - | - | - |
| Special Education Services | 4 | - | - | - | - | - |
Source: school_elpac, California Department of Education summative ELPAC 2025. Percentages are of English learners with a reported overall performance level. Grades and groups too small to report are suppressed by the state and show as -, which is not the same as zero.
Sources: state assessment files (EDFacts), school_graduation_v2 (NCES adjusted-cohort), school_sat_act + CRDC SAT/ACT.