Enrollment
393
Elementary
DISTRICT 243 · STATE 315
SCHOOL COMMUNITY·ST. LOUIS CITY·NCES 292928001930
MASON ELEM.
6031 SOUTHWEST AVE, ST LOUIS, MO 63139 · (314) 645-1201 · St. Louis city
GRADES PK–06ELEMENTARY11-CITYTITLE IREGULAR SCHOOL393 STUDENTS
B
allk12 Grade
Scored higher than 64% of Missouri public elementary schools
- C+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- ABeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- AThree-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 Missouri public elementary schools
Student : Teacher
11.2:1
35 FTE teachers
DISTRICT 11.5:1 · STATE 12.4:1
Free / Reduced Lunch
100%
393 students
DISTRICT 100% · 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 |
|---|---|---|
| Pre-K | 56 | 14% |
| Kindergarten | 50 | 13% |
| Grade 1 | 51 | 13% |
| Grade 2 | 50 | 13% |
| Grade 3 | 47 | 12% |
| Grade 4 | 60 | 15% |
| Grade 5 | 44 | 11% |
| Grade 6 | 35 | 9% |
This year's kindergarten class (50) is 43% larger than its 6th grade class (35).
Student demographics
67%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 42% · 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
37.7%
MO avg 44.9% . +0.1pp since 2021
Math
42.5%
MO avg 43.8% . +17.9pp since 2021
What this means: On the MAP, Missouri's statewide test, about 38 of every 100 students at this school read and write at grade level and about 43 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 18 points.
Performance levels, 2024-25
| Subject | Advanced | Proficient | Basic | Below Basic |
|---|---|---|---|---|
| English Language Arts | 15.9% | 21.8% | 42.6% | 19.5% |
| Math | 19.5% | 23.0% | 26.0% | 31.3% |
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 | 37.7% | 42.5% |
| 2023-24 | 38.9% | 37.5% |
| 2022-23 | 40.1% | 31.9% |
| 2021-22 | 37.6% | 24.6% |
% 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
35.8%
composite math + reading, all grades
Predicted
22.4%
based on MO schools with similar FRL share
Beats by
+13.4pp
above demographic expectation
What this means: About 36% of students here test proficient in math and reading, compared with the roughly 22% 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 MASON ELEM.
MASON ELEM.'s state test result (35.8% proficient) is higher than 3 of the 4 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| MASON ELEM. this school | 393 | 100.0% | 35.8% |
| CLIPPARD ELEM. CAPE GIRARDEAU | 383 | 100.0% | 34.0% |
| BUDER ELEM. ST LOUIS | 359 | 100.0% | 28.3% |
| WEST BLVD. ELEM. COLUMBIA | 327 | 100.0% | 33.1% |
| H. BYRON MASTERSON ELEM. KENNETT | 417 | 100.0% | N/A |
| BLANCHARD ELEM. CAPE GIRARDEAU | 326 | 100.0% | 61.0% |
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 MASON ELEM. ranks
Among elementary schools| Measure | This school | In Missouri | In St. Louis city |
|---|---|---|---|
| State test proficiency ranked highest first | 35.8% | #636 of 1,002 | #6 of 57 |
| Math proficiency ranked highest first | 42.5% | #500 of 1,019 ▲ 102 | #6 of 57 no change |
| Reading proficiency ranked highest first | 37.7% | #649 of 1,018 ▼ 28 | #8 of 57 no change |
| 3-year test score change ranked biggest gain first | +9.0pp | #129 of 943 | #2 of 37 |
| Enrollment ranked largest first | 393 | #417 of 1,294 | #13 of 66 |
| Students per teacher ranked fewest first | 11.2:1 | #174 of 950 | #14 of 42 |
| Diversity index ranked most diverse first | 66.7% | #92 of 953 | #5 of 42 |
| Free and reduced lunch ranked highest share first | 100% | #182 of 1,165 | #19 of 63 |
| Enrollment change since 2017-18 ranked steepest decline first | -6.7% | #524 of 684 | #36 of 41 |
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
393
-69 (-15%) vs 2020
+4% since 2000-01, when it was 379
Student : Teacher
11.2:1
was 13.6:1
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 | 393 | 35 | 11.2:1 | 100% (393) |
| 2023-24 | 391 | 26 | 15.0:1 | 100% (391) |
| 2022-23 | 389 | 28 | 13.9:1 | 99% (386) |
| 2020-21 | 462 | 34 | 13.6:1 | 99% (459) |
| 2017-18 | 421 | 33.2 | 12.7:1 | 100% (421) |
| 2015-16 | 479 | 31 | 15.4:1 | 100% (479) |
| 2010-11 | 362 | 27 | 13.4:1 | 78% (281) |
| 2000-01 | 379 | 28 | 13.5:1 | 94% (358) |
Source: NCES Common Core of Data. Rows are the federal collections on file for MASON ELEM..
Since 2017-18: students down 7% (421 to 393); teachers up 5% (33.2 to 35).
About MASON ELEM.
MASON ELEM. is a mid-sized elementary school in ST LOUIS, Missouri, under ST. LOUIS CITY. In all, 393 students attend the school in pre-K through 6. That is 25% bigger than the average of about 315 students for elementary schools in Missouri.
ST. LOUIS CITY counts 17,933 students in its 62 schools, and MASON ELEM. is one of them.
White students account for 43% of enrollment at MASON ELEM., more than any other group. Enrollment also includes 36% Black, 14% Hispanic, 3% Asian, and 3% multiracial. St. Louis city residents are about 46% White, a similar share. The diversity index for MASON ELEM. is 67%. For US public schools as a whole it is 70%.
On staff are 35 full-time-equivalent teachers; the student-to-teacher ratio is 11.2:1. Elementary schools in Missouri average 12.4:1, 1.2 more students per teacher than here. MASON ELEM. has a free or reduced-price lunch rate of 100%.
Among Missouri public elementary schools, MASON ELEM. outscored 64%, which works out to a B on the allk12 Grade.
MASON ELEM. is 13.4 points above its predicted average proficiency rate across its state test results (35.8% versus 22.4%), which places it in neither the top nor the bottom 10% in Missouri.
The county, St. Louis city, is where the school is located. The median household earns about $56,160 a year, the share of adults with a bachelor's degree or higher is 41%, and roughly 15% of residents are in poverty. St. Louis city has 113 public schools with about 29,941 students, including MASON ELEM..
Of the public schools around it, MASON ELEM. is closest to SHAW VISUAL/PERF. ARTS CTR., about 0.7 miles away. There are at least 8 other public schools within five miles. MASON ELEM.'s average proficiency of 35.8% compares with 57.8% for its nearest scored neighbors.
Federal data place MASON ELEM. in the City: Large locale, which means it is inside a principal city with a population of 250,000 or more.
A 15% decline took enrollment from 462 in 2020-21 to 393 in 2024-25. In 2020-21, the student-to-teacher ratio was 13.6:1; by 2024-25 it was 11.2:1.
Use the discussion section to ask about open houses, carpools, and field trips at MASON ELEM.. Current and former families are welcome to add their experience.
St. Louis city at a glance
View full county profilePopulation
288,512
Census ACS
Median income
$56,160
Household, ACS
Bachelor's+
41%
Adults 25+
Poverty rate
15%
Below federal line
Schools in county
113
29,941 students
Quick facts
Related schools
Other schools in ST. LOUIS CITY
- GATEWAY HIGHHigh · 860 students
- ROOSEVELT HIGHHigh · 734 students
- VASHON HIGHHigh · 621 students
- MCKINLEY CLASS. LEADERSHIP AC.High · 610 students
- STIX EARLY CHILDHOOD CTR.Elementary · 472 students
- MILLER CAREER ACADEMYHigh · 430 students
Other schools in ST LOUIS
- RITENOUR SR. HIGHHigh · 2,041 students
- OAKVILLE SR. HIGHHigh · 1,847 students
- LADUE HORTON WATKINS HIGHHigh · 1,395 students
- MEHLVILLE HIGH SCHOOLHigh · 1,388 students
- HAZELWOOD EAST HIGHHigh · 1,310 students
- WEBSTER GROVES HIGHHigh · 1,253 students
Other MASON Elementary schools
8 other US public schools in 8 states are named MASON Elementary. MASON ELEM. is the 4th largest of the 9.
- MASON ELEM.LEE'S SUMMIT, MO · 512 students
- Mason Elementary SchoolDuluth, GA · 913 students
- Mason ElementarySan Diego, CA · 538 students
- Mason Elementary SchoolMASON, TX · 298 students
- Mason Elementary SchoolChicago, IL · 241 students
Nearby schools
- SHAW VISUAL/PERF. ARTS CTR.0.7 mi · 272
- GATEWAY SCIENCE ACAD/ST LOUIS0.7 mi · 377
- PREMIER CHARTER SCHOOL0.9 mi · 974
- GATEWAY SCIENCE ACADEMY MIDDLE1.0 mi · 426
- GATEWAY SCIENCE ACADEMY HIGH1.0 mi · 461
- MALLINCKRODT A.B.I. ELEM.1.0 mi · 313
Frequently asked questions
About MASON ELEM.How many students attend MASON ELEM.?
MASON ELEM. enrolls approximately 393 students in grades PK-06.
Is MASON ELEM. an elementary, middle, or high school?
MASON ELEM. is an elementary school covering grades PK-06.
How many students per teacher at MASON ELEM.?
Approximately 11.2:1 students per teacher at MASON ELEM..
What is the racial breakdown of students at MASON ELEM.?
At MASON ELEM., the student body is approximately 43% White, 14% Hispanic, 36% Black, 3% Asian, 3% Two or more.
Is MASON ELEM. public or private?
MASON ELEM. is a public K-12 school, overseen by ST. LOUIS CITY.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.