Scores updated for 2026!

Chaffey Joint Union High

San Bernardino County school performance

Summary

Reading and math results average to the 72nd percentile among California school districts.

64.4% of students met California's reading standard, but it is trending down slightly.Trending down

Math is weaker: 36.4% of students met California's math standard, but it is slowly trending up.Trending up

Proficiency Stats
Current Reading Proficiency64.4%
Current Math Proficiency36.4%
District Reading Rank150 / 977 (85th percentile)
District Math Rank398 / 977 (59th percentile)
Other Stats
Student / Teacher Ratio24:1
Spend per Student$18,894
Schools in District10
Student Enrollment22,040
Low-Income Students15,246 (68.9%)
English Learners1,777 (8.0%)

Test score trends

2024 - 2026

Reading fell 3.7 points from last year and fell 2.7 points over the full period. Math rose 2.0 points from last year and rose 4.7 points over the full period.

Reading -2.7 percentage pointsTrend down•Math +4.7 percentage pointsTrend up
Changes shown: Reading 2024–2026; Math 2024–2026.

Board Members

nameelectedup for re-election

Cary W. Willborn

President (Trustee Area 5)

[email protected]
N/AN/A

English

Board Member

20222026This year!

Board website

Expand for details on low-income and english learner performance

Reading Proficiency Scores

Comparison of low-income and English learner groups using district-level CAASPP proficiency data.

Low-Income vs Non-Low-Income

Low-income students trail other students by 16.6 points in reading. It widened slightly over the period shown.

Low-Income
Non-Low-Income
Low-Income -2.0 percentage pointsTrend down•
Non-Low-Income -1.6 percentage pointsTrend down

English Learners vs English Native

6.5% of English learners meet the reading standard, compared with 67.1% of English-only students. The gap narrowed as English-learner results fell and English-only results fell.

English Learners
English Native
English Learners -1.1 percentage pointsTrend down•
English Native -2.5 percentage pointsTrend down

Math Proficiency Scores

Comparison of low-income and English learner groups using district-level CAASPP proficiency data.

Low-Income vs Non-Low-Income

Low-income students trail other students by 20.3 points in math. It widened slightly over the period shown.

Low-Income
Non-Low-Income
Low-Income +5.1 percentage pointsTrend up•
Non-Low-Income +6.4 percentage pointsTrend up

English Learners vs English Native

14.9% of English learners meet the math standard, compared with 37.4% of English-only students. The gap narrowed as English-learner results rose and English-only results rose.

English Learners
English Native
English Learners +9.4 percentage pointsTrend up•
English Native +4.5 percentage pointsTrend up

District School Map

Schools in this district, color-coded by reading proficiency.

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Hover over a school marker to see details

Schools

Alta Loma High

8880 Baseline Road, Alta Loma, 91701-5504

School Detail
67.9% — Alta Loma HighTrend down-6.9% — Alta Loma High38.7% — Alta Loma HighTrend down-2.8% — Alta Loma High

Chaffey District Online High

1802 East 7th Street, Ontario, 91764-1210

School Detail
77.8% — Chaffey District Online HighTrend down-9.7% — Chaffey District Online High77.1% — Chaffey District Online HighTrend up+14.6% — Chaffey District Online High

Chaffey High

1245 North Euclid Avenue, Ontario, 91762-1997

School Detail
53.2% — Chaffey HighTrend down-1.5% — Chaffey High22.1% — Chaffey HighTrend up+3.4% — Chaffey High

Colony High

3850 East Riverside Drive, Ontario, 91761-2603

School Detail
55.6% — Colony HighTrend down-2.7% — Colony High24.8% — Colony HighTrend up+5.9% — Colony High

Etiwanda High

13500 Victoria Street, Etiwanda, 91739-0447

School Detail
76.0% — Etiwanda HighTrend up+3.1% — Etiwanda High46.8% — Etiwanda HighTrend up+7.0% — Etiwanda High

Los Osos High

6001 Milliken Avenue, Rancho Cucamonga, 91737-7709

School Detail
83.0% — Los Osos HighTrend up+1.3% — Los Osos High58.8% — Los Osos HighTrend up+10.2% — Los Osos High

Montclair High

4725 Benito Street, Montclair, 91763-2705

School Detail
64.5% — Montclair HighTrend up+1.1% — Montclair High24.9% — Montclair HighTrend up+0.1% — Montclair High

Ontario High

901 West Francis Street, Ontario, 91762-6214

School Detail
54.4% — Ontario HighTrend down-7.5% — Ontario High28.6% — Ontario HighTrend up+8.5% — Ontario High

Rancho Cucamonga High

11801 Lark Drive, Rancho Cucamonga, 91701-8715

School Detail
69.6% — Rancho Cucamonga HighTrend down-3.9% — Rancho Cucamonga High45.8% — Rancho Cucamonga HighTrend up+7.8% — Rancho Cucamonga High

Valley View High (Continuation)

1801 East Sixth Street, Ontario, 91764-1599

School Detail
9.8% — Valley View High (Continuation)0.0% — Valley View High (Continuation)8.8% — Valley View High (Continuation)Trend up+8.8% — Valley View High (Continuation)

Understanding this district

How does Chaffey Joint Union High rank in California?

Chaffey Joint Union High ranks No. 150 of 977 in reading and No. 398 of 977 in math for 2026. These proficiency rankings compare districts across all district types.

How much do results vary between Chaffey Joint Union High’s schools?

Among the 10 schools serving 9–12, proficiency ranges from 9.8% to 83.0% in reading and 8.8% to 77.1% in math.

See the district’s schools

Are results improving across Chaffey Joint Union High’s schools?

Over 2024–2026, reading proficiency rose at 3 of 10 schools with results covering that full period; math rose at 9 of 10.

Compare school trends

How do low-income students in Chaffey Joint Union High compare with other districts?

Low-income reading proficiency is 59.7%, compared with 45.3% at a typical California high district. In math, it is 30.6%, compared with 19.5%.

See student-group results

Which districts should I compare with Chaffey Joint Union High?

High districts in San Bernardino County. Peers have the closest enrollment sizes.

2026 proficiency
DistrictMathReading
Chaffey Joint Union HighThis district36.4%64.4%
Victor Valley Union High23.1%46.1%
Compare these districts
How we compare low-income results

“Typical” is the median across 74 California high districts with 2026 results, a reported low-income population, and at least 20 low-income tested students in each subject. Each district counts once. This compares proficiency for low-income students, rather than the gap between income groups.