Chaffey Joint Union High
Chaffey Joint Union High has 10 ranked schools across high levels with an average Scope Score of 55.5/100 — 11.8 points above the California state average of 43.8. The highest-scoring school is Los Osos High at 72/100, where 39.5% of students exceed the state standard. The district spends $13,126 per student (below the state average of $14,815). Chronic absenteeism averages 35.0%, above the state average. Data source: CDE CAASPP 2025 and NCES fiscal data, analyzed by SchoolScope.
District Analysis
Consistency: Score range of 50.9 points — showing significant variation between schools.
Absenteeism: District chronic absenteeism averages 35.0%, 16.8pp below the state average of 18.1%.
Suspensions: District suspension rate averages 4.0%, below the state average of 1.7%.
Top school: Los Osos High leads the district at 72 with 39.5% exceeding standard.
How we score · Scope Score methodology
School archetypes in Chaffey Joint Union High
Archetypes are data-driven labels based on Scope Score dimensions. Learn more
Student demographics
District averages · California Department of Education enrollment data
District Funding
Chaffey Joint Union High spends $13,126 per student in current expenditures — $1,689 below the state average of $14,815.
Data source: NCES Common Core of Data, Fiscal Survey (F-33) · 2019–2020
Teacher compensation
CDE Form J-90 salary schedule · 2024–25
High Schools (10)
Chaffey Joint Union High has 10 ranked high schools averaging a Scope Score of 55.5 — 8.1 points above the state average of 47.5. 1 of 10 high schools score above 70.
The highest-scoring high school is Los Osos High with a Scope Score of 72 and 39.5% exceeding standard.
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Los Osos High Chaffey Joint Union High Building Momentum | 39.5% | Strong 72/100 |
| 2 | Etiwanda High Chaffey Joint Union High Strong All-Around | 35.4% | Solid 66/100 |
| 3 | Rancho Cucamonga High Chaffey Joint Union High Building Momentum | 33.2% | Solid 65/100 |
| 4 | Chaffey District Online High Chaffey Joint Union High Strong All-Around | 42.6% | Solid 61/100 |
| 5 | Alta Loma High Chaffey Joint Union High Building Momentum | 23.0% | Solid 60/100 |
| 6 | Ontario High Chaffey Joint Union High Building Momentum | 19.6% | Solid 56/100 |
| 7 | Montclair High Chaffey Joint Union High Building Momentum | 21.9% | Solid 54/100 |
| 8 | Colony High Chaffey Joint Union High Building Momentum | 15.8% | Solid 52/100 |
| 9 | Chaffey High Chaffey Joint Union High Building Momentum | 16.7% | Developing 49/100 |
| 10 | Valley View High (Continuation) Chaffey Joint Union High Building Momentum | 1.3% | Needs Support 21/100 |
Data source: California Department of Education · CAASPP 2024-25 · Methodology
Scores are SchoolScope's analysis of public data, not official CDE ratings. They represent one way of interpreting test results and should not be the sole basis for school decisions.
What Scope Scores can't tell you about Chaffey Joint Union High
- Class sizes and student-teacher interaction quality
- Quality of arts, music, athletics, and enrichment programs
- Teacher experience, turnover, and professional development
- Campus safety, bullying climate, and social-emotional support
- Parent and community engagement levels
- Quality of special education and gifted programs
- How resources are distributed across schools within the district
Scope Scores measure academic performance and school climate using public data. They are one lens among many. Full methodology