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What's the most underrated thing about Chaffey High that outsiders don't know?
Community prompt from u/allk12. Replies below.
Enrollment
3,127
High
DISTRICT 2,004 · STATE 838
SCHOOL COMMUNITY·CHAFFEY JOINT UNION HIGH·NCES 060816000791
Chaffey High
1245 North Euclid Ave., Ontario, CA 91762 · (909) 988-5560 · San Bernardino County
GRADES 09–12HIGH12-CITYTITLE IREGULAR SCHOOL3,127 STUDENTS
B
allk12 Grade
Scored higher than 61% of California public high schools
- B-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- B+Three-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded California public high schools
Student : Teacher
23.4:1
134 FTE teachers
DISTRICT 21.6:1 · STATE 18.2:1
Free / Reduced Lunch
81%
2,547 students
DISTRICT 70% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 773 | 25% |
| Grade 10 | 820 | 26% |
| Grade 11 | 784 | 25% |
| Grade 12 | 750 | 24% |
Student demographics
21%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 55% · STATE 62% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
58.8%
CA avg 49.1% . -1.3pp since 2014
Math
20.5%
CA avg 37.7% . -3.5pp since 2014
What this means: On the CAASPP, California's statewide test, about 59 of every 100 students at this school read and write at grade level and about 21 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are down about 1 points since 2014, while math scores are down about 3 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 26.3% | 32.4% | 21.3% | 19.9% |
| Math | 7.1% | 13.4% | 20.5% | 59.0% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 58.8% | 20.5% |
| 2023-24 | 54.7% | 18.8% |
| 2022-23 | 50.2% | 18.6% |
| 2021-22 | 54.6% | 15.2% |
| 2020-21 | 60.3% | 31.7% |
| 2018-19 | 51.0% | 20.1% |
| 2017-18 | 55.6% | 18.6% |
| 2016-17 | 57.5% | 18.9% |
| 2015-16 | 64.0% | 27.0% |
| 2014-15 | 60.0% | 24.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
38.2%
composite math + reading, all grades
Predicted
31.8%
based on CA schools with similar FRL share
Beats by
+6.3pp
above demographic expectation
What this means: About 38% of students here test proficient in math and reading, compared with the roughly 32% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Chaffey High
Chaffey High's state test result (38.2% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Chaffey High this school | 3,127 | 81.5% | 38.2% |
| Warren (Earl) High Downey | 3,609 | 79.8% | 51.3% |
| Pacifica High Oxnard | 2,675 | 81.2% | 24.1% |
| Montclair High Montclair | 2,515 | 83.3% | 46.9% |
| Downey High Downey | 4,051 | 79.2% | 49.5% |
| Rialto High Rialto | 2,623 | 85.7% | 39.7% |
Matched among California high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Chaffey High ranks
Among high schools| Measure | This school | In California | In San Bernardino County |
|---|---|---|---|
| State test proficiency ranked highest first | 38.2% | #574 of 1,052 | #26 of 54 |
| Math proficiency ranked highest first | 20.5% | #657 of 1,056 ▼ 9 | #33 of 56 ▼ 3 |
| Reading proficiency ranked highest first | 58.8% | #504 of 1,056 ▲ 46 | #26 of 56 ▲ 4 |
| 3-year test score change ranked biggest gain first | +4.7pp | #358 of 1,044 | #33 of 56 |
| Enrollment ranked largest first | 3,127 | #23 of 2,093 | #3 of 102 |
| Students per teacher ranked fewest first | 23.4:1 | #1,035 of 1,352 | #55 of 78 |
| Diversity index ranked most diverse first | 20.8% | #1,089 of 1,351 | #68 of 77 |
| Free and reduced lunch ranked highest share first | 81.5% | #574 of 1,575 | #39 of 84 |
| Enrollment change since 2017-18 ranked steepest decline first | -5.2% | #627 of 802 | #33 of 46 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
3,127
-236 (-7%) vs 2020
+12% since 1990-91, when it was 2,786
Student : Teacher
23.4:1
was 24.9:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 3,127 | 133.8 | 23.4:1 | 81% (2,547) |
| 2023-24 | 3,223 | 135.3 | 23.8:1 | 81% (2,603) |
| 2022-23 | 3,346 | 137.9 | 24.3:1 | 84% (2,823) |
| 2020-21 | 3,363 | 135 | 24.9:1 | 87% (2,916) |
| 2017-18 | 3,297 | 138.8 | 23.8:1 | 85% (2,813) |
| 2015-16 | 3,482 | 138 | 25.2:1 | 87% (3,045) |
| 2010-11 | 3,720 | N/A | N/A | 69% (2,562) |
| 2000-01 | 3,581 | 154 | 23.3:1 | 27% (981) |
| 1990-91 | 2,786 | 123 | 22.6:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Chaffey High.
Since 2017-18: students down 5% (3,297 to 3,127); teachers down 4% (138.8 to 133.8).
About Chaffey High
In Ontario, California, part of San Bernardino County, Chaffey High is a high school. The grade span is 9 through 12, and enrollment is 3,127 students. An average school in this group (high schools in California) has about 838 students.
Chaffey High is one school in an 11-school district, Chaffey Joint Union High, which enrolls 22,040 students.
Chaffey High enrolls a student body that is 89% Hispanic. The school is also 3% Black, 3% White, and 3% Asian. That is higher than the 55% Hispanic share among all San Bernardino County residents. By the diversity index, Chaffey High comes in at 21%.
The school's student-to-teacher ratio is about 23.4:1, with 133.8 full-time-equivalent teachers. The average ratio among high schools in California is 18.2:1, lower than at this school. Students eligible for free or reduced-price lunch make up 81% of enrollment.
allk12 grades Chaffey High a B. The grade compares the school only with California public high schools, because each state gives its own test.
Chaffey High is 6.3 points above its predicted average proficiency rate on state tests (38.2% versus 31.8%), which places it in neither the top nor the bottom 10% in California.
San Bernardino County has these Census figures: median household income is about $85,478, about 23% of adults have at least a bachelor's degree, and the poverty rate is about 11%. Chaffey High is among the 583 public schools in San Bernardino County.
The next-closest public school is Vina Danks Middle, about 0.3 miles away. There are at least 8 more public schools inside five miles. Chaffey High ranks 4th of 9 among nearby schools on average proficiency, with 38.2% against a local average of 38.4%.
The federal government classifies Chaffey High's location as City: Mid-size.
Federal counts put enrollment at 3,363 in 2020-21 and 3,127 in 2024-25, a 7% decrease. In 2020-21, the student-to-teacher ratio was 24.9:1; by 2024-25 it was 23.4:1.
Community posts for Chaffey High can cover sports schedules, lunch menus, and spirit week. Alumni can share how the school prepared them.
San Bernardino County at a glance
View full county profilePopulation
2,197,104
Census ACS
Median income
$85,478
Household, ACS
Bachelor's+
23%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
583
393,648 students
Quick facts
Related schools
Other schools in Chaffey Joint Union High
- Etiwanda HighHigh · 3,446 students
- Rancho Cucamonga HighHigh · 3,221 students
- Los Osos HighHigh · 2,759 students
- Montclair HighHigh · 2,515 students
- Alta Loma HighHigh · 2,386 students
- Colony HighHigh · 2,109 students
Other schools in Ontario
- Colony HighHigh · 2,109 students
- Ontario HighHigh · 1,994 students
- Park View ElementaryElementary · 844 students
- Ranch View ElementaryElementary · 738 students
- Central Language AcademyElementary · 736 students
- Edison ElementaryElementary · 736 students
Nearby schools
- Vina Danks Middle0.3 mi · 544
- Edison Elementary0.6 mi · 736
- Hawthorne Elementary0.6 mi · 549
- Central Language Academy0.7 mi · 736
- Berlyn Elementary0.8 mi · 639
- Citrus Elementary0.9 mi · 494
Frequently asked questions
About Chaffey HighWhat is the total enrollment at Chaffey High?
Chaffey High enrolls approximately 3,127 students in grades 09-12.
Is Chaffey High an elementary, middle, or high school?
Chaffey High is a high school covering grades 09-12.
How many students per teacher at Chaffey High?
Approximately 23.4:1 students per teacher at Chaffey High.
How diverse is Chaffey High?
Chaffey High reports a student body of 3% White, 89% Hispanic, 3% Black, 3% Asian, 2% Two or more.
What district is Chaffey High in?
Chaffey High is part of Chaffey Joint Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.