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Chaffey Joint Union High

Los Osos High

6001 Milliken Avenue, Rancho Cucamonga, CA 91737-7709

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Summary

Los Osos High is a good school.

Reading and math results average to the 90th percentile among comparable California schools.

79.0% of students met California's reading standard, and it is holding steady.

50.9% of students met California's math standard, and it is trending down slightly.Trending down

Proficiency Stats
Current Reading Proficiency79.0%
Current Math Proficiency50.9%
Reading State Rank139/1609 (91st percentile)
Math State Rank170/1605 (89th percentile)
Other Stats
Student / Teacher Ratio26:1
Student Enrollment2,759
Low-Income Students1,221 (44.3%)
English Learners84 (3.0%)
Quick links
School WebsiteGreat SchoolsNicheEd-DataCAASPP
2-Year Trends
2023 - 2025
Reading +0.2%Trend up•Math -0.5%Trend down
Showing school-level proficiency for the last three years

Reading Proficiency Scores

Race, economic status, English learner status, and distribution of scores by grade.

Race and Ethnicity
Distribution of Scores by Grade
Low-Income vs Non-Low-Income
Low-Income
Non-Low-Income
Low-Income +3.7%Trend up•
Non-Low-Income -0.4%Trend down
English Learners vs English Native
English Learners
English Native
English Learners +8.3%Trend up•
English Native -1.5%Trend down

Math Proficiency Scores

Race, economic status, English learner status, and distribution of scores by grade.

Race and Ethnicity
Distribution of Scores by Grade
Low-Income vs Non-Low-Income
Low-Income
Non-Low-Income
Low-Income -2.2%Trend down•
Non-Low-Income +2.5%Trend up
English Learners vs English Native
English Learners
English Native
English Learners +11.7%Trend up•
English Native -2.5%Trend down
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