Chaffey Joint Union High: Chaffey Joint Union High averages 49.7/100 — 4.9 points above the state average.
Chaffey Joint Union High has 10 ranked schools across high levels with an average Scope Score of 49.7/100 — 4.9 points above the state average of 44.8. The highest-scoring school is Los Osos High at 64/100, 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 34.8%, above the state average. Data source: CDE CAASPP 2025 and NCES fiscal data, analyzed by SchoolScope.
Chaffey Joint Union High's high schools average 49.7/100 — 6.0 points above the state average.
District Analysis
Chaffey Joint Union High has 10 ranked schools with an average Scope Score of 49.7/100 — 4.9 points above the state average of 44.8 (CDE CAASPP 2025).
Score range of 45.2 points — showing significant variation between schools.
District chronic absenteeism averages 34.8%, 16.9pp above the state average of 17.9%.
District suspension rate averages 3.9%, above the state average of 1.6%.
Los Osos High leads the district at 64 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
Every school in Chaffey Joint Union High
ranked by Scope Score · 2024–25 CAASPP
High Schools (10)
Chaffey Joint Union High has 10 ranked high schools averaging a Scope Score of 49.7 — 6.0 points above the state average of 43.7.
The highest-scoring high school is Los Osos High with a Scope Score of 64 and 39.5% exceeding standard.
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Los Osos High Chaffey Joint Union High Building Momentum | 39.5% | Solid 64/100 |
| 2 | Etiwanda High Chaffey Joint Union High Strong All-Around | 35.4% | Solid 59/100 |
| 3 | Rancho Cucamonga High Chaffey Joint Union High Building Momentum | 33.2% | Solid 58/100 |
| 4 | Chaffey District Online High Chaffey Joint Union High Building Momentum | 42.6% | Solid 55/100 |
| 5 | Alta Loma High Chaffey Joint Union High Building Momentum | 23.0% | Solid 52/100 |
| 6 | Ontario High Chaffey Joint Union High Building Momentum | 19.6% | Solid 50/100 |
| 7 | Montclair High Chaffey Joint Union High Building Momentum | 21.9% | Developing 49/100 |
| 8 | Colony High Chaffey Joint Union High Building Momentum | 15.8% | Developing 46/100 |
| 9 | Chaffey High Chaffey Joint Union High Building Momentum | 16.7% | Developing 44/100 |
| 10 | Valley View High (Continuation) Chaffey Joint Union High Building Momentum | 1.3% | Needs Support 19/100 |
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.
Numbers tell you whether students are clearing the bar. A school visit tells you whether they're happy doing it. These metrics are intentionally missing from the Scope Score: class sizes and student-teacher interaction quality; arts, music, athletics, and enrichment programs; teacher experience and turnover; campus safety and social-emotional support; parent and community engagement; quality of special education and gifted programs; how resources are distributed across schools within the district. Full methodology