Diamond Bar High
See below for the California Smarter Balanced results for tests which were taken by students in the spring of 2025, and reported by EdSource. The tests form part of the state's California Assessment of Student Performance and Progress, or CAASPP. Hover over colors in the charts to see percentages for each achievement level.
For some schools the results for student groups will show as asterisks to indicate that the state withheld results because 10 or fewer students took the test. Scores are for 2025 unless otherwise noted. Data may not add up to 100% due to rounding. Tests for 2020 were not given statewide due to Covid-19 pandemic. Testing in 2021 was optional, with results missing in some schools and districts. Both years are excluded from the database.
Overall Test Results
In the overall Diamond Bar High test results for 2025, 76.32% of students met or exceeded the state standard in English, while 23.68% did not, a decrease of -1.67% from 2024. In math, 68.33% of students met or exceeded the state standard, with 31.67% not meeting it: an increase of 1.61% from 2024.
Tests for 2020 were not given statewide due to Covid-19 pandemic. Testing in 2021 was optional, with results missing in some schools and districts. Both years are excluded from the graph above.
| Subject | Minimal 2025 | Chg. From 2024 | Developing 2025 | Chg. From 2024 | Proficient 2025 | Chg. From 2024 | Advanced 2025 | Chg. From 2024 |
|---|---|---|---|---|---|---|---|---|
| English | 10.88% | 0.35% | 12.8% | 1.32% | 27.84% | -2.94% | 48.48% | 1.27% |
| Math | 16.08% | 0.97% | 15.59% | -2.58% | 24.28% | -3.05% | 44.05% | 4.66% |
Achievement Gap Results: Racial/Demographic Breakdown
Tests for 2020 were not given statewide due to Covid-19 pandemic. Testing in 2021 was optional, with results missing in some schools and districts. Both years are excluded from the graph above.
English: Proficient or Advanced (Standard Met or Exceeded)
| Year | African American | Hispanic | White | Asian |
|---|---|---|---|---|
| 2015 | 61.0% | 52.0% | 70.0% | 84.0% |
| 2016 | 9.0% | 43.0% | 56.0% | 79.0% |
| 2017 | 45.0% | 57.45% | 84.15% | 84.44% |
| 2018 | 60.87% | 51.15% | 74.58% | 81.45% |
| 2019 | 66.67% | 66.43% | 80.0% | 84.97% |
| 2022 | 58.82% | 59.62% | 78.05% | 84.82% |
| 2023 | 54.55% | 60.55% | 77.5% | 84.9% |
| 2024 | 0.0% | 66.96% | 80.49% | 80.77% |
| 2025 | 53.33% | 52.83% | 70.37% | 82.41% |
Math: Proficient or Advanced (Standard Met or Exceeded)
| Year | African American | Hispanic | White | Asian |
|---|---|---|---|---|
| 2015 | 32.0% | 34.0% | 55.0% | 87.0% |
| 2016 | 10.0% | 33.0% | 53.0% | 86.0% |
| 2017 | 45.0% | 39.72% | 68.29% | 86.77% |
| 2018 | 34.78% | 25.76% | 53.33% | 84.87% |
| 2019 | 33.33% | 38.13% | 64.81% | 87.36% |
| 2022 | 23.53% | 37.86% | 52.38% | 83.59% |
| 2023 | 27.27% | 32.11% | 51.22% | 81.98% |
| 2024 | 0.0% | 34.51% | 53.66% | 77.97% |
| 2025 | 46.67% | 27.88% | 53.85% | 79.71% |
2025 TEST RESULTS BY RACE AND ETHNICITY
| Race/Ethnicity | English: Minimal | English: Developing | English: Proficient | English: Advanced |
|---|---|---|---|---|
| White | 14.81% | 14.81% | 25.93% | 44.44% |
| Hispanic | 19.81% | 27.36% | 32.08% | 20.75% |
| African-American | 20.0% | 26.67% | 13.33% | 40.0% |
| Asian | 8.67% | 8.92% | 26.75% | 55.66% |
| Filipino | 5.41% | 13.51% | 37.84% | 43.24% |
| Race/Ethnicity | Math: Minimal | Math: Developing | Math: Proficient | Math: Advanced |
|---|---|---|---|---|
| White | 26.92% | 19.23% | 30.77% | 23.08% |
| Hispanic | 48.08% | 24.04% | 15.38% | 12.5% |
| African-American | 46.67% | 6.67% | 33.33% | 13.33% |
| Asian | 6.76% | 13.53% | 24.64% | 55.07% |
| Filipino | 13.51% | 8.11% | 32.43% | 45.95% |
2025 Test Results By Grade Level
| Grade | English: Minimal | English: Developing | English: Proficient | English: Advanced |
|---|---|---|---|---|
| Grade 11 | 10.88% | 12.8% | 27.84% | 48.48% |
| Grade | Math: Minimal | Math: Developing | Math: Proficient | Math: Advanced |
|---|---|---|---|---|
| Grade 11 | 16.08% | 15.59% | 24.28% | 44.05% |
2025 TEST RESULTS FOR LOW INCOME STUDENTS
| Status | English: Economically Disadvantaged | English: Not Economically Disadvantaged | Math: Economically Disadvantaged | Math: Not Economically Disadvantaged |
|---|---|---|---|---|
| Minimal | 12.1% | 10.47% | 22.08% | 14.1% |
| Developing | 18.47% | 10.9% | 15.58% | 15.6% |
| Proficient | 28.03% | 27.78% | 24.03% | 24.36% |
| Advanced | 41.4% | 50.85% | 38.31% | 45.94% |
2025 TEST RESULTS BY GENDER
| Gender | English: Male | English: Female | Math: Male | Math: Female |
|---|---|---|---|---|
| Minimal | 10.88% | 10.88% | 14.85% | 17.47% |
| Developing | 12.69% | 12.93% | 12.73% | 18.84% |
| Proficient | 25.98% | 29.93% | 21.82% | 27.05% |
| Advanced | 50.45% | 46.26% | 50.61% | 36.64% |
