How does Ontario High compare to other high schools in Ontario?

Ontario High has a SchoolScope composite score of 55.3/100, placing it at the 63rd percentile statewide. 20% of students exceed standard, with a total of 988 students tested across grades and subjects.

What percentage of students exceed standards at Ontario High?

19.6% of students at Ontario High exceed the state standard on CAASPP assessments, while 46.0% meet or exceed it. The gap between these two numbers reveals whether the school pushes students beyond basic proficiency.

What is the chronic absenteeism rate at Ontario High?

32.5% of students at Ontario High are chronically absent (missing 10% or more of school days). This metric reflects school culture and family engagement, and is weighted at 15% in our composite score.

Ontario High

High School

Chaffey Joint Union High OntarioSan Bernardino County91762

Composite Score

out of 100

State Percentile

of high schools

State Rank

of 1,739 California high schools

School overview

Enrollment

2,121 students

Student-Teacher Ratio

22:1

Free/Reduced Lunch

87%

Teachers

95 full-time

College & career readiness

Graduation Rate

94.5%

AP Exam Prepared

46.3%

A-G Completion

61.6%

College-Going Rate

61.5%

Data source: California Department of Education — ACGR, CCI, CGR reports

Dashboard indicators

ELA Year-over-Year

Increased

+8.7 pts DFS change

Math Year-over-Year

Increased Significantly

+23.3 pts DFS change

EL Proficiency (ELPAC)

12.1%

English learners at Level 4 (Well Developed) · 198 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic88.8%

White2.5%

Asian2.9%

Black2.2%

Other3.6%

Performance breakdown

Performance breakdown for Ontario High
Category	Percentage
Exceeded Standard	19.6%
Met Standard	26.4%
Below Standard	54.0%

What other rankings don't show you

Most rating sites report "46% proficient" for Ontario High and stop there. Here's what that number hides:

19.6% of students exceeded standard while 26.4% merely met it. That exceeded rate is 4.1 points above the state average of 15.5%. That's 5.3 points below the Chaffey Joint Union High district average of 24.9%. Nearby schools (within ~3 miles) average 18.6% exceeded — about the same. The gap between "met" and "exceeded" is the difference between a school that clears the bar and one that raises it.

The graduation rate is 94.5% — above the state target. 61.6% of students complete A-G requirements for UC/CSU eligibility — a strong college readiness signal. 61.5% of graduates go on to college within a year.

Chronic absenteeism is 32.5%, better than the state average of 34.0%.

Why the exceeded vs. met split matters →