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

Colony High has a SchoolScope composite score of 53.3/100, placing it at the 58th percentile statewide. 16% of students exceed standard, with a total of 964 students tested across grades and subjects.

What percentage of students exceed standards at Colony High?

15.8% of students at Colony High exceed the state standard on CAASPP assessments, while 37.3% 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 Colony High?

31.4% of students at Colony 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.

Colony High

High School

Chaffey Joint Union High OntarioSan Bernardino County91761

Composite Score

out of 100

State Percentile

of high schools

State Rank

of 1,739 California high schools

School overview

Enrollment

2,085 students

Student-Teacher Ratio

24:1

Free/Reduced Lunch

72%

Teachers

87 full-time

College & career readiness

Graduation Rate

88.8%

AP Exam Prepared

57.0%

A-G Completion

64.8%

College-Going Rate

67.2%

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

Dashboard indicators

ELA Year-over-Year

Declined

-9.4 pts DFS change

Math Year-over-Year

Increased Significantly

+15.6 pts DFS change

EL Proficiency (ELPAC)

11.3%

English learners at Level 4 (Well Developed) · 160 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic68.4%

White7.2%

Asian7.2%

Black11.4%

Other5.8%

Performance breakdown

Performance breakdown for Colony High
Category	Percentage
Exceeded Standard	15.8%
Met Standard	21.6%
Below Standard	62.7%

What other rankings don't show you

Most rating sites report "37% proficient" for Colony High and stop there. Here's what that number hides:

15.8% of students exceeded standard while 21.6% merely met it. That exceeded rate is near the state average of 15.5%. That's 9.1 points below the Chaffey Joint Union High district average of 24.9%. 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 88.8%. 64.8% of students complete A-G requirements for UC/CSU eligibility — a strong college readiness signal. 67.2% of graduates go on to college within a year.

Chronic absenteeism is 31.4%, better than the state average of 34.0%.

Why the exceeded vs. met split matters →