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Email BoardCosumnes Oaks High
8350 Lotz Parkway, Elk Grove, CA 95757
Summary
Reading and math results average to the 76th percentile among comparable California schools.
65.6% of students met California's reading standard, but it is trending down slightly.
Math is weaker: 40.0% of students met California's math standard, and it is trending down slightly.
Proficiency stats
| Current Reading Proficiency | 65.6% |
| Current Math Proficiency | 40.0% |
| Reading State Rank | 422/1,596 (74th percentile) |
| Math State Rank | 337/1,596 (79th percentile) |
School information
| Student / Teacher Ratio | 21:1 |
| Student enrollment (2024–25) | 2,109 |
| Low-Income Students | 821 (38.9%) |
| English Learners | 102 (4.8%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 0.2 points from last year and fell 1.2 points over the full period. Math fell 2.4 points from last year and fell 1.7 points over the full period.
•Math -1.7 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Filipino and Asian students have the strongest results.
Distribution of Scores by Grade
65.6% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank in the top 27% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 13.8-point reading income gap is narrower than the 14.7-point gap at a typical California 9–12 school. It narrowed over the period shown.
•English Learners vs English Native
4.8% of English learners meet the reading standard, compared with 65.0% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Filipino students have the strongest math results at about 53% proficiency. The other reported groups range from about 27% to 52%.
Distribution of Scores by Grade
40.0% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank in the top 22% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 16.1-point math income gap is slightly wider than the 14.2-point gap at a typical California 9–12 school. It widened over the period shown.
•English Learners vs English Native
13.6% of English learners meet the math standard, compared with 38.4% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•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 Cosumnes Oaks High compare within the district?
Cosumnes Oaks High is No. 2 in reading and No. 3 in math proficiency among the 9 9–12 schools in Elk Grove Unified with 2026 results.
Explore the district’s schoolsHow does Cosumnes Oaks High rank in California?
Cosumnes Oaks High ranks No. 422 of 1,596 in reading and No. 337 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 Cosumnes Oaks High compare within the district?
Low-income students here rank No. 2 in reading and No. 5 in math among 9 9–12 district schools with reportable 2026 results for this group. 57.6% meet the reading standard and 30.6% meet the math standard.
See results by student groupHow does Cosumnes Oaks High compare with other schools in Elk Grove?
Cosumnes Oaks High is No. 2 in reading and No. 3 in math proficiency among the 6 9–12 schools in Elk Grove with 2026 results.
Explore schools in Elk GroveHow does Cosumnes Oaks High compare with other schools in Sacramento County?
Cosumnes Oaks High is No. 9 in reading and No. 8 in math proficiency among the 48 9–12 schools in Sacramento County with 2026 results.
Explore schools in Sacramento CountyWhich schools should I compare?
Schools serving 9–12 in the same district.
| School | Math | Reading |
|---|---|---|
| Cosumnes Oaks HighThis school | 40.0% | 65.6% |
| Elk Grove High | 31.4% | 58.7% |
| Franklin High | 46.3% | 57.8% |
