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What's the biggest difference between Chaparral Middle and what you expected?
Community prompt from u/allk12. Replies below.
Enrollment
1,349
Middle
DISTRICT 1,173 · STATE 659
SCHOOL COMMUNITY·WALNUT VALLEY UNIFIED·NCES 064128006834
Chaparral Middle
1405 South Spruce Tree Dr., Diamond Bar, CA 91765 · (909) 861-6227 · Los Angeles County
GRADES 06–08MIDDLE21-SUBURBREGULAR SCHOOL1,349 STUDENTS
A+
allk12 Grade
Scored higher than 99% of California public middle schools
- A+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- A+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 middle schools
Student : Teacher
28.3:1
48 FTE teachers
DISTRICT 26.7:1 · STATE 20.7:1
Free / Reduced Lunch
25%
332 students
DISTRICT 26% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 6 | 478 | 35% |
| Grade 7 | 444 | 33% |
| Grade 8 | 427 | 32% |
Student demographics
38%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 46% · 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
82.8%
CA avg 49.1% . +7.8pp since 2014
Math
80.3%
CA avg 37.7% . +14.3pp since 2014
What this means: On the CAASPP, California's statewide test, about 83 of every 100 students at this school read and write at grade level and about 80 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are up about 8 points since 2014, while math scores are up about 14 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 52.7% | 30.1% | 9.6% | 7.5% |
| Math | 63.7% | 16.6% | 12.1% | 7.6% |
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 | 82.8% | 80.3% |
| 2023-24 | 82.4% | 79.3% |
| 2022-23 | 81.4% | 74.3% |
| 2021-22 | 80.3% | 73.9% |
| 2018-19 | 77.5% | 77.7% |
| 2017-18 | 79.7% | 76.8% |
| 2016-17 | 79.0% | 74.9% |
| 2015-16 | 77.0% | 70.0% |
| 2014-15 | 75.0% | 66.0% |
% 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
OUTPERFORMING
Top 10% of CA schools after controlling for student poverty
Actual proficiency
81.2%
composite math + reading, all grades
Predicted
65.1%
based on CA schools with similar FRL share
Beats by
+16.1pp
above demographic expectation
What this means: About 81% of students here test proficient in math and reading, well above the roughly 65% typical for California schools with a similar share of low-income students. BeatsExpectations ranks schools against others at the same poverty level, not by raw scores, so a school can post high scores and still fall short of its prediction, or post lower scores and still beat it. This school clears its prediction by about 16 points, placing it in California's top 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 Chaparral Middle
Chaparral Middle's state test result (81.2% proficient) is higher than 4 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Chaparral Middle this school | 1,349 | 24.6% | 81.2% |
| John M. Horner Middle Fremont | 1,574 | 23.2% | 78.7% |
| South Pointe Middle Walnut | 979 | 25.0% | 78.3% |
| William Hopkins Middle Fremont | 1,424 | 18.0% | 87.1% |
| Thornton Middle Fremont | 1,972 | 24.1% | 76.3% |
| Suzanne Middle Walnut | 1,190 | 24.5% | 68.4% |
Matched among California middle 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 Chaparral Middle ranks
Among middle schools| Measure | This school | In California | In Los Angeles County |
|---|---|---|---|
| State test proficiency ranked highest first | 81.2% | #29 of 1,224 | #2 of 248 |
| Math proficiency ranked highest first | 80.3% | #29 of 1,227 ▼ 3 | #2 of 248 ▲ 1 |
| Reading proficiency ranked highest first | 82.8% | #46 of 1,227 ▼ 9 | #6 of 248 ▼ 2 |
| 3-year test score change ranked biggest gain first | +4.5pp | #353 of 1,214 | #108 of 247 |
| Enrollment ranked largest first | 1,349 | #40 of 1,377 | #14 of 317 |
| Students per teacher ranked fewest first | 28.3:1 | #1,261 of 1,279 | #296 of 301 |
| Diversity index ranked most diverse first | 37.7% | #852 of 1,278 | #145 of 301 |
| Free and reduced lunch ranked highest share first | 24.6% | #1,185 of 1,329 | #293 of 312 |
| Enrollment change since 2017-18 ranked fastest growth first | +8.8% | #109 of 257 | #24 of 38 |
Ranked against other public middle 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
1,349
+155 (+13%) vs 2020
+32% since 1990-91, when it was 1,019
Student : Teacher
28.3:1
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 | 1,349 | 47.7 | 28.3:1 | 25% (332) |
| 2023-24 | 1,204 | 45.8 | 26.3:1 | 25% (300) |
| 2022-23 | 1,133 | 44.2 | 25.6:1 | 22% (250) |
| 2020-21 | 1,194 | 48 | 24.9:1 | 23% (277) |
| 2017-18 | 1,240 | 46.4 | 26.7:1 | 20% (252) |
| 2015-16 | 1,212 | 46 | 26.4:1 | 13% (162) |
| 2010-11 | 1,281 | N/A | N/A | 11% (135) |
| 2000-01 | 1,217 | 47 | 25.9:1 | 5% (59) |
| 1990-91 | 1,019 | 39 | 26.1:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Chaparral Middle.
Since 2017-18: students up 9% (1,240 to 1,349); teachers up 3% (46.4 to 47.7).
About Chaparral Middle
Chaparral Middle, located in Diamond Bar, California, is a high-enrollment middle-grades school. Grades offered run from 6 through 8, with 1,349 students enrolled. For comparison, middle schools in California average about 659 students.
The 15 schools in Walnut Valley Unified enroll 13,992 students altogether, Chaparral Middle among them.
By race and ethnicity, Chaparral Middle is 77% Asian. Other reported shares: 14% Hispanic, 4% White, and 3% multiracial. That compares with about 15% Asian among all Los Angeles County residents. By the diversity index, Chaparral Middle comes in at 38%.
Federal data list 47.7 full-time-equivalent teachers at Chaparral Middle in 2024-25, for a ratio of 28.3:1. Among middle schools in California, the typical ratio is 20.7:1. The lunch program counts 25% of students at Chaparral Middle as eligible for free or reduced-price meals. On average, public schools in Los Angeles County report 70%.
allk12 grades Chaparral Middle an A+. The grade compares the school only with California public middle schools, because each state gives its own test.
The BeatsExpectations model predicts 65.1% for Chaparral Middle, given its share of students eligible for free or reduced-price lunch. The actual figure is 81.2%. The 16.1-point gap ranks in the top 10% of California schools.
Across Los Angeles County, median household income is about $90,112, a bachelor's degree or higher is held by about 36% of adults, and the poverty rate is about 10%. The public schools of Los Angeles County number 2,244 and enroll about 1,265,907.
Nearby, Maple Hill Elementary is about 0.4 miles away. Other public schools within five miles number at least 8. Chaparral Middle is 2nd of 9 nearby schools by average proficiency rate.
NCES lists the school's locale as Suburb: Large. That means it sits in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
From 2020-21 to 2024-25, Chaparral Middle went from 1,194 students to 1,349. The student-to-teacher ratio went up from 24.9:1 to 28.3:1.
Posts about sports tryouts, band and choir, and theater are welcome on this page. Reviews and ratings from people who know the school are welcome.
Los Angeles County at a glance
View full county profilePopulation
9,808,667
Census ACS
Median income
$90,112
Household, ACS
Bachelor's+
36%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
2,244
1,265,907 students
Quick facts
Related schools
Other schools in Walnut Valley Unified
- Diamond Bar HighHigh · 2,563 students
- Walnut HighHigh · 2,148 students
- Suzanne MiddleMiddle · 1,190 students
- South Pointe MiddleMiddle · 979 students
- Evergreen ElementaryElementary · 709 students
- Walnut ElementaryElementary · 706 students
Other schools in Diamond Bar
- Diamond Bar HighHigh · 2,563 students
- Evergreen ElementaryElementary · 709 students
- Quail Summit ElementaryElementary · 696 students
- Lorbeer MiddleMiddle · 688 students
- Castle Rock ElementaryElementary · 684 students
- Maple Hill ElementaryElementary · 556 students
Other Chaparral Middle schools
3 other US public schools in 2 states are named Chaparral Middle. Chaparral Middle is the largest of the 4.
- Chaparral MiddleMoorpark, CA · 542 students
- CHAPARRAL MIDDLECHAPARRAL, NM · 546 students
- CHAPARRAL MIDDLEALAMOGORDO, NM · 513 students
Nearby schools
- Maple Hill Elementary0.4 mi · 556
- Quail Summit Elementary0.4 mi · 696
- Evergreen Elementary1.4 mi · 709
- Diamond Bar High1.5 mi · 2,563
- Lorbeer Middle1.6 mi · 688
- Armstrong Elementary1.8 mi · 251
Frequently asked questions
About Chaparral MiddleWhat is the total enrollment at Chaparral Middle?
Chaparral Middle enrolls approximately 1,349 students in grades 06-08.
What age range does Chaparral Middle serve?
Chaparral Middle serves students from grade 06 through grade 08.
What is the student-teacher ratio at Chaparral Middle?
The student-to-teacher ratio at Chaparral Middle is approximately 28.3:1 (48 FTE teachers).
What is the student diversity at Chaparral Middle?
Student demographics at Chaparral Middle are roughly 4% White, 14% Hispanic, 1% Black, 77% Asian, 3% Two or more.
What district is Chaparral Middle in?
Chaparral Middle is part of Walnut Valley Unified.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.