Acalanes High
1200 Pleasant Hill Road, Lafayette, CA 94549-2623
Summary
Acalanes High is an excellent school.
Reading and math results average to the 97th percentile among comparable California schools.
85.2% of students met California's reading standard, but it is trending down slightly.
70.3% of students met California's math standard, which is strong statewide and is trending up slightly.
Proficiency stats
| Current Reading Proficiency | 85.2% |
| Current Math Proficiency | 70.3% |
| Reading State Rank | 65/1,596 (96th percentile) |
| Math State Rank | 43/1,596 (97th percentile) |
School information
| Student / Teacher Ratio | 20:1 |
| Student enrollment (2024–25) | 1,256 |
| Low-Income Students | 92 (7.3%) |
| English Learners | 31 (2.5%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading rose 2.7 points from last year and fell 1.9 points over the full period. Math rose 7.2 points from last year and rose 3.0 points over the full period.
•Math +3.0 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Most students in every reported group meet the reading standard. Asian and Two or more races students have the strongest results.
Distribution of Scores by Grade
85.2% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank in the top 5% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 8.5-point reading income gap is narrower than the 14.7-point gap at a typical California 9–12 school. It narrowed slightly over the period shown.
•English Learners vs English Native
Results for both language groups are unavailable, so a current reading gap cannot be calculated.
Math Proficiency Scores
2026 state test results
Race and Ethnicity
Asian students have the strongest math results at about 85% proficiency. The other reported groups range from about 49% to 81%.
Distribution of Scores by Grade
70.3% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank in the top 3% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 26.8-point math income gap is nearly twice as wide as the 14.2-point gap at a typical California 9–12 school. It widened over the period shown.
•English Learners vs English Native
Results for both language groups are unavailable, so a current math gap cannot be calculated.
How we compare income gaps
“Typical” means the median gap across 876 schools for reading and 882 for math. The comparison uses 2026 California 9–12 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Acalanes High compare within the district?
Acalanes High is No. 3 in both reading and math proficiency among the 4 9–12 schools in Acalanes Union High with 2026 results.
Explore the district’s schoolsHow does Acalanes High rank in California?
Acalanes High ranks No. 65 of 1,596 in reading and No. 43 of 1,596 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Acalanes High compare within the district?
Low-income students here rank No. 2 in both subjects among 3 9–12 district schools with reportable 2026 results for this group. 77.3% meet the reading standard and 45.5% meet the math standard.
See results by student groupHow does Acalanes High compare with other schools in Contra Costa County?
Acalanes High is No. 4 in both reading and math proficiency among the 31 9–12 schools in Contra Costa County with 2026 results.
Explore schools in Contra Costa CountyWhich schools should I compare?
Schools serving 9–12 in the same district.
| School | Math | Reading |
|---|---|---|
| Acalanes HighThis school | 70.3% | 85.2% |
| Campolindo High | 76.7% | 88.4% |
| Las Lomas High | 50.8% | 67.0% |
