1
What tradition at Mary Casey Black Elementary should never be changed?
Community prompt from u/allk12. Replies below.
Enrollment
680
Elementary
DISTRICT 718 · STATE 465
SCHOOL COMMUNITY·BRENTWOOD UNION·NCES 060591013420
Mary Casey Black Elementary
480 Farmington Dr., Brentwood, CA 94513 · (925) 513-6430 · Contra Costa County
GRADES KG–05ELEMENTARY21-SUBURBTITLE IREGULAR SCHOOL680 STUDENTS
C+
allk12 Grade
Scored higher than 36% of California public elementary schools
- B-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- DBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- A-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 elementary schools
Student : Teacher
25.2:1
27 FTE teachers
DISTRICT 24.8:1 · STATE 22.3:1
Free / Reduced Lunch
47%
320 students
DISTRICT 44% · 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 | 172 | 25% |
| Grade 1 | 101 | 15% |
| Grade 2 | 109 | 16% |
| Grade 3 | 97 | 14% |
| Grade 4 | 100 | 15% |
| Grade 5 | 101 | 15% |
This year's kindergarten class (172) is 70% larger than its 5th grade class (101).
Student demographics
71%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 76% · 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
49.6%
CA avg 49.1% . +16.6pp since 2014
Math
39.1%
CA avg 37.7% . +10.1pp since 2014
What this means: On the CAASPP, California's statewide test, about 50 of every 100 students at this school read and write at grade level and about 39 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 17 points since 2014, while math scores are up about 10 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 24.6% | 25.0% | 21.8% | 28.5% |
| Math | 15.1% | 23.9% | 32.0% | 28.9% |
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 | 49.6% | 39.1% |
| 2023-24 | 38.2% | 31.4% |
| 2022-23 | 37.4% | 34.2% |
| 2021-22 | 44.2% | 31.7% |
| 2018-19 | 47.1% | 33.9% |
| 2017-18 | 41.3% | 35.3% |
| 2016-17 | 43.9% | 36.4% |
| 2015-16 | 44.0% | 33.0% |
| 2014-15 | 33.0% | 29.0% |
% 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
39.8%
composite math + reading, all grades
Predicted
52.0%
based on CA schools with similar FRL share
Beats by
-12.2pp
below demographic expectation
What this means: About 40% of students here test proficient in math and reading, compared with the roughly 52% 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 Mary Casey Black Elementary
Mary Casey Black Elementary's state test result (39.8% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mary Casey Black Elementary this school | 680 | 47.1% | 39.8% |
| Lake Mathews Elementary Riverside | 733 | 45.0% | 57.3% |
| Benjamin Franklin Elementary Riverside | 767 | 48.9% | 62.6% |
| Cambridge Elementary Vacaville | 738 | 46.1% | 42.9% |
| Skyblue Mesa Elementary Canyon Country | 569 | 48.9% | 45.2% |
| Liberty Elementary Fresno | 618 | 44.7% | 82.4% |
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 Mary Casey Black Elementary ranks
Among elementary schools| Measure | This school | In California | In Contra Costa County |
|---|---|---|---|
| State test proficiency ranked highest first | 39.8% | #2,513 of 5,151 | #75 of 149 |
| Math proficiency ranked highest first | 39.1% | #2,354 of 5,172 ▲ 575 | #76 of 153 ▲ 15 |
| Reading proficiency ranked highest first | 49.6% | #2,063 of 5,172 ▲ 829 | #72 of 153 ▲ 18 |
| 3-year test score change ranked biggest gain first | +6.4pp | #1,266 of 5,116 | #19 of 150 |
| Enrollment ranked largest first | 680 | #852 of 5,915 | #16 of 164 |
| Students per teacher ranked fewest first | 25.2:1 | #4,520 of 5,352 | #135 of 162 |
| Diversity index ranked most diverse first | 70.9% | #534 of 5,354 | #44 of 162 |
| Free and reduced lunch ranked highest share first | 47.1% | #4,044 of 5,625 | #82 of 158 |
| Enrollment change since 2017-18 ranked fastest growth first | +1.8% | #980 of 1,139 | #38 of 42 |
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
680
+3 (+0%) vs 2020
Student : Teacher
25.2:1
was 26.0:1
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 | 680 | 27 | 25.2:1 | 47% (320) |
| 2023-24 | 703 | 27.2 | 25.9:1 | 27% (193) |
| 2022-23 | 701 | 27.5 | 25.5:1 | 32% (227) |
| 2020-21 | 677 | 26 | 26.0:1 | 28% (188) |
| 2017-18 | 668 | 26 | 25.7:1 | 46% (304) |
| 2015-16 | 606 | 24 | 25.3:1 | 47% (282) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mary Casey Black Elementary.
Since 2017-18: students up 2% (668 to 680); teachers up 4% (26 to 27).
About Mary Casey Black Elementary
At 480 Farmington Dr. in Brentwood, California, Mary Casey Black Elementary operates as a mid-sized elementary school. It is open to students in kindergarten through 5 and enrolls 680 students. By comparison, elementary schools in California enroll about 465 students on average.
The 12 schools in Brentwood Union enroll 9,932 students altogether, Mary Casey Black Elementary among them.
Hispanic students make up 45% of enrollment at Mary Casey Black Elementary, the largest share of any group. Other groups include 23% White, 15% Asian, 12% multiracial, and 5% Black. Census estimates put the Hispanic share of Contra Costa County's population at about 28%. On the diversity index, which measures the chance that two random students are from different groups, Mary Casey Black Elementary scores 71%.
Mary Casey Black Elementary has a student-to-teacher ratio of 25.2:1, with 27 full-time-equivalent teachers. Compared with the 22.3:1 average for elementary schools in California, this school's ratio is higher. The school has 47% of students eligible for free or reduced-price lunch. The average for public schools in Contra Costa County is similar, at 45%.
On the allk12 Grade, Mary Casey Black Elementary lands at C+, ahead of 36% of California public elementary schools.
After adjusting for student poverty, Mary Casey Black Elementary lands between the top and bottom 10% of California schools. Its average proficiency rate across its state test results is 39.8%; the prediction is 52.0%.
In the wider Contra Costa County area, median household income comes to about $127,229, 45% of adults hold a bachelor's degree or higher, and about 6% of people live in poverty. Contra Costa County's 280 public schools enroll about 167,423 students and include Mary Casey Black Elementary.
Liberty High, about 0.9 miles away, is the closest public school. Counting only straight-line distance, at least 8 other public schools are within five miles. On state test proficiency, Mary Casey Black Elementary ranks 6th in a group of 6 nearby schools.
The school's setting, by NCES definition, is Suburb: Large: in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Federal data show 677 students in 2020-21 and 680 in 2024-25, a difference of under 3%.
Use the discussion section to ask about homework, tutoring, and testing dates at Mary Casey Black Elementary. Current and former families are welcome to add their experience.
Contra Costa County at a glance
View full county profilePopulation
1,165,012
Census ACS
Median income
$127,229
Household, ACS
Bachelor's+
45%
Adults 25+
Poverty rate
6%
Below federal line
Schools in county
280
167,423 students
Quick facts
Related schools
Other schools in Brentwood Union
- William B. Bristow MiddleMiddle · 1,223 students
- Adams (J. Douglas) MiddleMiddle · 1,197 students
- Edna Hill MiddleMiddle · 1,047 students
- R. Paul Krey ElementaryElementary · 885 students
- Pioneer ElementaryElementary · 859 students
- Brentwood ElementaryElementary · 811 students
Other schools in Brentwood
- Liberty HighHigh · 2,836 students
- Heritage HighHigh · 2,566 students
- William B. Bristow MiddleMiddle · 1,223 students
- Adams (J. Douglas) MiddleMiddle · 1,197 students
- Edna Hill MiddleMiddle · 1,047 students
- R. Paul Krey ElementaryElementary · 885 students
Nearby schools
- Liberty High0.9 mi · 2,836
- Independence High1.0 mi · 163
- Marsh Creek Elementary1.1 mi · 550
- Edna Hill Middle1.2 mi · 1,047
- Garin Elementary1.4 mi · 785
- ISAAC R. MONTANEZ ELEMENTARY1.5 mi · 444
Frequently asked questions
About Mary Casey Black ElementaryWhat is the total enrollment at Mary Casey Black Elementary?
Mary Casey Black Elementary enrolls approximately 680 students in grades KG-05.
What age range does Mary Casey Black Elementary serve?
Mary Casey Black Elementary serves students from grade KG through grade 05.
How many students per teacher at Mary Casey Black Elementary?
Approximately 25.2:1 students per teacher at Mary Casey Black Elementary.
What is the student diversity at Mary Casey Black Elementary?
Student demographics at Mary Casey Black Elementary are roughly 23% White, 45% Hispanic, 5% Black, 15% Asian, 12% Two or more.
What district is Mary Casey Black Elementary in?
Mary Casey Black Elementary is part of Brentwood Union.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.