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Welcome to the Castle Rock Elementary community. What's one thing that would make Castle Rock Elementary even better?
Community prompt from u/allk12. Replies below.
Enrollment
684
Elementary
DISTRICT 636 · STATE 465
SCHOOL COMMUNITY·WALNUT VALLEY UNIFIED·NCES 064128006833
Castle Rock Elementary
2975 Castle Rock Rd., Diamond Bar, CA 91765 · (909) 598-5006 · Los Angeles County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL684 STUDENTS
Student : Teacher
26.1:1
26 FTE teachers
DISTRICT 25.7:1 · STATE 22.3:1
Free / Reduced Lunch
27%
182 students
DISTRICT 26% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 131 | 19% |
| Grade 1 | 76 | 11% |
| Grade 2 | 102 | 15% |
| Grade 3 | 101 | 15% |
| Grade 4 | 137 | 20% |
| Grade 5 | 137 | 20% |
This year's kindergarten class (131) is about the same size as its 5th grade class (137).
Student demographics
47%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
71.2%
CA avg 49.1% . +4.2pp since 2014
Math
70.5%
CA avg 37.7% . -0.5pp since 2014
What this means: On the CAASPP, California's statewide test, about 71 of every 100 students at this school read and write at grade level and about 71 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 4 points since 2014, while math scores have held steady.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 42.9% | 28.3% | 13.0% | 15.8% |
| Math | 43.1% | 27.4% | 17.5% | 12.0% |
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 | 71.2% | 70.5% |
| 2023-24 | 67.7% | 67.6% |
| 2022-23 | 73.6% | 69.8% |
| 2021-22 | 70.6% | 70.9% |
| 2018-19 | 70.7% | 73.9% |
| 2017-18 | 70.2% | 71.0% |
| 2016-17 | 68.2% | 72.7% |
| 2015-16 | 75.0% | 80.0% |
| 2014-15 | 67.0% | 71.0% |
% 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
69.4%
composite math + reading, all grades
Predicted
64.0%
based on CA schools with similar FRL share
Beats by
+5.4pp
above demographic expectation
What this means: About 69% of students here test proficient in math and reading, compared with the roughly 64% 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 Castle Rock Elementary
Castle Rock Elementary's state test result (69.4% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Castle Rock Elementary this school | 684 | 26.6% | 69.4% |
| Evergreen Elementary Diamond Bar | 709 | 25.8% | 73.7% |
| Quail Summit Elementary Diamond Bar | 696 | 25.0% | 80.7% |
| Warwick Elementary Fremont | 700 | 27.1% | 77.8% |
| Parkmont Elementary Fremont | 734 | 24.0% | 73.2% |
| Camino Grove Elementary Arcadia | 695 | 29.2% | 79.2% |
Matched among California elementary 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 Castle Rock Elementary ranks
Among elementary schools| Measure | This school | In California | In Los Angeles County |
|---|---|---|---|
| State test proficiency ranked highest first | 69.4% | #681 of 5,151 | #149 of 1,126 |
| Math proficiency ranked highest first | 70.5% | #580 of 5,172 ▲ 131 | #128 of 1,129 ▲ 29 |
| Reading proficiency ranked highest first | 71.2% | #692 of 5,172 ▲ 137 | #156 of 1,129 ▲ 33 |
| 3-year test score change ranked biggest gain first | +0.1pp | #3,312 of 5,116 | #811 of 1,116 |
| Enrollment ranked largest first | 684 | #844 of 5,915 | #147 of 1,300 |
| Students per teacher ranked fewest first | 26.1:1 | #4,891 of 5,352 | #1,100 of 1,213 |
| Diversity index ranked most diverse first | 46.6% | #3,025 of 5,354 | #500 of 1,214 |
| Free and reduced lunch ranked highest share first | 26.6% | #4,907 of 5,625 | #1,160 of 1,276 |
| Enrollment change since 2017-18 ranked steepest decline first | -0.7% | #3,784 of 3,837 | #943 of 947 |
Ranked against other public elementary 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
684
+1 (+0%) vs 2020
-7% since 1990-91, when it was 737
Student : Teacher
26.1:1
was 25.3:1
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 | 684 | 26.2 | 26.1:1 | 27% (182) |
| 2023-24 | 691 | 26.5 | 26.1:1 | 27% (190) |
| 2022-23 | 646 | 26.2 | 24.7:1 | 27% (173) |
| 2020-21 | 683 | 27 | 25.3:1 | 19% (133) |
| 2017-18 | 689 | 27 | 25.5:1 | 21% (144) |
| 2015-16 | 624 | 23 | 27.1:1 | 9% (56) |
| 2010-11 | 512 | N/A | N/A | 9% (47) |
| 2000-01 | 653 | 31 | 21.1:1 | 7% (48) |
| 1990-91 | 737 | 26 | 28.4:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Castle Rock Elementary.
Since 2017-18: students down 1% (689 to 684); teachers down 3% (27 to 26.2).
About Castle Rock Elementary
Castle Rock Elementary is a mid-sized elementary school in Diamond Bar, California, one of the schools in Walnut Valley Unified. Enrollment totals 684 students across kindergarten through 5. The school is 47% bigger than the average for elementary schools in California.
Walnut Valley Unified oversees Castle Rock Elementary and 14 other schools, with 13,992 students in total.
Of every 100 students at Castle Rock Elementary, about 70 are Asian. The rest of enrollment is 19% Hispanic, 5% multiracial, and 3% White. Among all residents of Los Angeles County, the Asian share is about 15%. The diversity index for Castle Rock Elementary is 47%. For US public schools as a whole it is 70%.
Castle Rock Elementary reported 26.2 full-time-equivalent teachers in 2024-25, a ratio of 26.1:1. Elementary schools in California average 22.3:1, 3.8 fewer students per teacher than here. There are 182 students eligible for free or reduced-price lunch, 27% of enrollment. That is lower than the 70% average for public schools in Los Angeles County.
The model predicts 64.0% for a school in California with Castle Rock Elementary's free or reduced-price lunch share. Castle Rock Elementary posts 69.4%.
Census data for Los Angeles County show median household income comes to about $90,112, about 36% of adults have at least a bachelor's degree, and the poverty rate is about 10%. The county has 2,244 public schools and about 1,265,907 students.
Castle Rock Elementary's closest public school neighbor is Evergreen Elementary, about 0.7 miles away. A five-mile radius around the school includes at least 8 other public schools. Nearby schools average 72.7% on proficiency, and Castle Rock Elementary is below that at 69.4%.
NCES assigns Castle Rock Elementary the locale Suburb: Large, meaning in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Federal data show 683 students in 2020-21 and 684 in 2024-25, a difference of under 3%.
On allk12, people connected to Castle Rock Elementary can post about pickup and drop-off, after-school programs, and teacher feedback. Current and former families are welcome to add their experience.
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
- Chaparral MiddleMiddle · 1,349 students
- Suzanne MiddleMiddle · 1,190 students
- South Pointe MiddleMiddle · 979 students
- Evergreen ElementaryElementary · 709 students
Other schools in Diamond Bar
- Diamond Bar HighHigh · 2,563 students
- Chaparral MiddleMiddle · 1,349 students
- Evergreen ElementaryElementary · 709 students
- Quail Summit ElementaryElementary · 696 students
- Lorbeer MiddleMiddle · 688 students
- Maple Hill ElementaryElementary · 556 students
Other Castle Rock Elementary schools
4 other US public schools in 3 states are named Castle Rock Elementary. Castle Rock Elementary is the 2nd largest of the 5.
- Castle Rock ElementaryWoodlake, CA · 418 students
- Castle Rock ElementaryCastella, CA · 42 students
- Castle Rock ElementaryCASTLE ROCK, WA · 733 students
- Castle Rock Elementary SchoolCASTLE ROCK, CO · 440 students
Nearby schools
- Evergreen Elementary0.7 mi · 709
- Diamond Bar High0.8 mi · 2,563
- South Pointe Middle1.4 mi · 979
- Maple Hill Elementary2.0 mi · 556
- Shelyn Elementary2.0 mi · 508
- Ybarra Academy for the Arts and Technology2.1 mi · 630
Frequently asked questions
About Castle Rock ElementaryHow large is Castle Rock Elementary?
Castle Rock Elementary enrolls approximately 684 students in grades KG-05.
Is Castle Rock Elementary an elementary, middle, or high school?
Castle Rock Elementary is an elementary school covering grades KG-05.
How many teachers does Castle Rock Elementary have?
Castle Rock Elementary employs 26 FTE teachers, for a student-to-teacher ratio of 26.1:1.
How diverse is Castle Rock Elementary?
Castle Rock Elementary reports a student body of 3% White, 19% Hispanic, 1% Black, 70% Asian, 5% Two or more.
What district is Castle Rock Elementary in?
Castle Rock Elementary is part of Walnut Valley Unified.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.