Chaffey Joint Union High
Los Osos High
6001 Milliken Avenue, Rancho Cucamonga, CA 91737-7709
Summary
Los Osos High is a good school.
79.0% of students are reading at grade level in Los Osos High, and it is holding steady.
Math is weaker at 50.9%, and it is trending down slightly.
Proficiency Stats
| Current Reading Proficiency | 79.0% |
| Current Math Proficiency | 50.9% |
| Reading State Rank | 139/1609 (91st percentile) |
| Math State Rank | 170/1605 (89th percentile) |
Other Stats
| Student / Teacher Ratio | 26:1 |
| Student Enrollment | 2,759 |
School Website
Great Schools
Niche
Ed-Data
CAASPP2-Year Trends
2023 - 2025
Reading +0.2%
•Math -0.5%
•Math -0.5%Showing school-level proficiency for the last three years
Reading Proficiency Scores
Race and ethnicity proficiency plus distribution of scores by grade.
Race and Ethnicity
Distribution of Scores by Grade
Math Proficiency Scores
Race and ethnicity proficiency plus distribution of scores by grade.
Race and Ethnicity
Distribution of Scores by Grade