Enrollment
401
Elementary
DISTRICT 387 · STATE 315
SCHOOL COMMUNITY·PARKWAY C-2·NCES 292358002626
OAK BROOK ELEM.
510 BIG BEND RD, BALLWIN, MO 63021 · (314) 415-6550 · St. Louis County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL401 STUDENTS
Student : Teacher
15.0:1
27 FTE teachers
DISTRICT 13.3:1 · STATE 12.4:1
Free / Reduced Lunch
10%
40 students
DISTRICT 17% · STATE 54%
Community
0
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 | 76 | 19% |
| Grade 1 | 55 | 14% |
| Grade 2 | 72 | 18% |
| Grade 3 | 64 | 16% |
| Grade 4 | 66 | 16% |
| Grade 5 | 68 | 17% |
This year's kindergarten class (76) is 12% larger than its 5th grade class (68).
Student demographics
45%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 62% · STATE 52% · 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
MAP 2024-25 . % Proficient + AdvancedEnglish Language Arts
68.1%
MO avg 44.9% . -0.9pp since 2021
Math
63.5%
MO avg 43.8% . +4.4pp since 2021
What this means: On the MAP, Missouri's statewide test, about 68 of every 100 students at this school read and write at grade level and about 64 of 100 do math at grade level. Across all Missouri schools, those numbers are about 45 and 44. Reading and writing scores have held steady since 2021, while math scores are up about 4 points.
Performance levels, 2024-25
| Subject | Advanced | Proficient | Basic | Below Basic |
|---|---|---|---|---|
| English Language Arts | 37.4% | 30.7% | 25.6% | 6.1% |
| Math | 34.3% | 29.2% | 25.1% | 11.2% |
Share of tested students at each MAP level. Each student counts in one level, so a row adds to about 100%.
MAP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 68.1% | 63.5% |
| 2023-24 | 55.5% | 58.2% |
| 2022-23 | 67.4% | 63.8% |
| 2021-22 | 69.0% | 59.1% |
% Proficient + Advanced, all students and all tested grades.
Source: MAP. 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
59.2%
composite math + reading, all grades
Predicted
56.2%
based on MO schools with similar FRL share
Beats by
+3.1pp
above demographic expectation
What this means: About 59% of students here test proficient in math and reading, compared with the roughly 56% typical for Missouri 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 Missouri'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 OAK BROOK ELEM.
OAK BROOK ELEM.'s state test result (59.2% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| OAK BROOK ELEM. this school | 401 | 10.0% | 59.2% |
| MERAMEC ELEM. CLAYTON | 368 | 5.2% | 81.1% |
| CHESTERFIELD ELEM. CHESTERFIELD | 389 | 6.4% | 79.2% |
| GREEN PINES ELEM. WILDWOOD | 423 | 10.9% | 61.7% |
| TWIN CHIMNEYS ELEM. O'FALLON | 488 | 8.2% | 60.0% |
| HIGHCROFT RIDGE ELEM. CHESTERFIELD | 369 | 9.2% | 69.0% |
Matched among Missouri 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 OAK BROOK ELEM. ranks
Among elementary schools| Measure | This school | In Missouri | In St. Louis County |
|---|---|---|---|
| State test proficiency ranked highest first | 59.2% | #150 of 1,002 | #43 of 133 |
| Math proficiency ranked highest first | 63.5% | #117 of 1,019 ▲ 70 | #32 of 138 ▲ 17 |
| Reading proficiency ranked highest first | 68.1% | #60 of 1,018 ▲ 151 | #27 of 138 ▲ 30 |
| 3-year test score change ranked biggest gain first | +1.8pp | #450 of 943 | #65 of 130 |
| Enrollment ranked largest first | 401 | #392 of 1,294 | #64 of 165 |
| Students per teacher ranked fewest first | 15.0:1 | #816 of 950 | #105 of 149 |
| Diversity index ranked most diverse first | 44.9% | #387 of 953 | #61 of 151 |
| Free and reduced lunch ranked highest share first | 10.0% | #1,116 of 1,165 | #119 of 154 |
| Enrollment change since 2017-18 ranked steepest decline first | -22.6% | #149 of 684 | #14 of 103 |
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
401
-43 (-10%) vs 2020
-29% since 1990-91, when it was 566
Student : Teacher
15.0:1
was 15.9:1
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 | 401 | 26.8 | 15.0:1 | 10% (40) |
| 2023-24 | 375 | 25.6 | 14.7:1 | 9% (32) |
| 2022-23 | 390 | 26 | 15.0:1 | 8% (31) |
| 2020-21 | 444 | 28 | 15.9:1 | 11% (49) |
| 2017-18 | 518 | 32 | 16.2:1 | 11% (59) |
| 2015-16 | 531 | 30 | 17.7:1 | 12% (63) |
| 2010-11 | 488 | 30 | 16.3:1 | 7% (33) |
| 2000-01 | 593 | 36 | 16.5:1 | 15% (87) |
| 1990-91 | 566 | 28 | 20.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for OAK BROOK ELEM..
Since 2017-18: students down 23% (518 to 401); teachers down 16% (32 to 26.8).
About OAK BROOK ELEM.
OAK BROOK ELEM. is a mid-sized elementary school for students in BALLWIN, Missouri. Federal data show 401 students enrolled in kindergarten through 5 in 2024-25. Across elementary schools in Missouri, the average enrollment is about 315.
PARKWAY C-2 has 16,759 students spread across 29 schools.
More than half of the students at OAK BROOK ELEM. are White (73%). The rest of enrollment is 13% Asian, 6% multiracial, 4% Black, and 3% Hispanic. Census estimates put the White share of St. Louis County's population at about 62%. The diversity index for OAK BROOK ELEM. is 45%. For US public schools as a whole it is 70%.
Teacher count: 26.8 full-time equivalents. Student-to-teacher ratio: 15.0:1. Compared with the 12.4:1 average for elementary schools in Missouri, this school's ratio is higher. Eligibility for free or reduced-price lunch, often used to gauge student poverty, is 10%. Among public schools in St. Louis County, the average eligibility rate is 43%.
Test results at OAK BROOK ELEM. are 3.1 points above what its free or reduced-price lunch share predicts (59.2% actual, 56.2% predicted).
Census data for St. Louis County show the median household earns about $82,936 a year, 47% of adults hold a bachelor's degree or higher, and about 7% of people live in poverty. Counting OAK BROOK ELEM., St. Louis County has 275 public schools.
Measured in a straight line, SORRENTO SPRINGS ELEM. is about 0.7 miles from OAK BROOK ELEM.. Around the school, at least 8 other public schools are within five miles. In a group of 9 nearby schools with scores, OAK BROOK ELEM. ranks 2nd on average proficiency.
Federal records code the school's setting as Suburb: Large.
Enrollment decreased by 10% across 4 years, from 444 in 2020-21 to 401 in 2024-25.
The discussion board for OAK BROOK ELEM. is open to topics like athletics, class schedules, and weather closures. Parents, students, alumni, and staff are welcome to post.
St. Louis County at a glance
View full county profilePopulation
995,569
Census ACS
Median income
$82,936
Household, ACS
Bachelor's+
47%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
275
134,601 students
Quick facts
Related schools
Other schools in PARKWAY C-2
- SOUTH HIGHHigh · 1,485 students
- WEST HIGHHigh · 1,417 students
- CENTRAL HIGHHigh · 1,281 students
- NORTH HIGHHigh · 990 students
- CENTRAL MIDDLEMiddle · 881 students
- WEST MIDDLEMiddle · 814 students
Other schools in BALLWIN
- WEST HIGHHigh · 1,417 students
- SOUTHWEST MIDDLEMiddle · 803 students
- SELVIDGE MIDDLEMiddle · 583 students
- HENRY ELEM.Elementary · 512 students
- CLAYMONT ELEM.Elementary · 460 students
- BALLWIN ELEM.Elementary · 426 students
Nearby schools
- SORRENTO SPRINGS ELEM.0.7 mi · 288
- WREN HOLLOW ELEM.1.2 mi · 409
- WOERTHER ELEM.1.4 mi · 423
- SOUTHWEST MIDDLE1.4 mi · 803
- SOUTH HIGH1.7 mi · 1,485
- BALLWIN ELEM.1.7 mi · 426
Frequently asked questions
About OAK BROOK ELEM.What is the total enrollment at OAK BROOK ELEM.?
OAK BROOK ELEM. enrolls approximately 401 students in grades KG-05.
What grades does OAK BROOK ELEM. serve?
OAK BROOK ELEM. serves grades KG-05.
How many teachers does OAK BROOK ELEM. have?
OAK BROOK ELEM. employs 27 FTE teachers, for a student-to-teacher ratio of 15.0:1.
What is the student diversity at OAK BROOK ELEM.?
Student demographics at OAK BROOK ELEM. are roughly 73% White, 3% Hispanic, 4% Black, 13% Asian, 6% Two or more.
Is OAK BROOK ELEM. public or private?
OAK BROOK ELEM. is a public K-12 school, overseen by PARKWAY C-2.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.