Lassen High
1110 Main Street, Susanville, CA 96130-4421
Summary
Lassen High is badly underperforming.
Reading and math results average to the 34th percentile among comparable California schools.
Only 32.9% of students met California's reading standard, and it is quickly trending down.
Math is weaker: 15.8% of students met California's math standard, it is holding steady.
Proficiency stats
| Current Reading Proficiency | 32.9% |
| Current Math Proficiency | 15.8% |
| Reading State Rank | 1,157/1,596 (28th percentile) |
| Math State Rank | 965/1,596 (40th percentile) |
School information
| Student / Teacher Ratio | 20:1 |
| Student enrollment (2024–25) | 816 |
| Low-Income Students | 279 (34.2%) |
| English Learners | 27 (3.3%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 18.3 points from last year and fell 18.3 points over the full period. Math fell 1.2 points from last year and fell 0.2 points over the full period.
•Math -0.2 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
White and Hispanic or Latino students have the strongest results.
Distribution of Scores by Grade
32.9% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank No. 1,157 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 12.5-point reading income gap is narrower than the 14.7-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 reading gap cannot be calculated.
Math Proficiency Scores
2026 state test results
Race and Ethnicity
Hispanic or Latino students have the strongest math results at about 18% proficiency. The other reported groups range from about 15% to 18%.
Distribution of Scores by Grade
15.9% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank No. 965 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 3.6-point math income gap is narrower than the 14.2-point gap at a typical California 9–12 school. It widened slightly 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 Lassen High rank in California?
Lassen High ranks No. 1,157 of 1,596 in reading and No. 965 of 1,596 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does Lassen High compare with other schools in Lassen County?
Lassen High is No. 1 in both reading and math proficiency among the 2 9–12 schools in Lassen County with 2026 results.
Explore schools in Lassen County