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SCHOOL COMMUNITY·CLAYTON·NCES 290972000275

CLAYTON HIGH

#1 MARK TWAIN CIRCLE, CLAYTON, MO 63105 · (314) 854-6600 · St. Louis County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL788 STUDENTS
A+
allk12 Grade
Scored higher than 97% of Missouri public high schools
  • A+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 high schools

Enrollment
788
High
DISTRICT 473 · STATE 501
Student : Teacher
9.9:1
80 FTE teachers
DISTRICT 10.1:1 · STATE 12.2:1
Free / Reduced Lunch
8%
63 students
DISTRICT 8% · STATE 54%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 917322%
Grade 1021627%
Grade 1118924%
Grade 1221027%
Student demographics
61%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 58% · STATE 52% · US 70%
White
46259%
DISTRICT 61% · STATE 67% · US 43%
Hispanic
344%
DISTRICT 4% · STATE 9% · US 30%
Black
11815%
DISTRICT 13% · STATE 15% · US 15%
Asian
10013%
DISTRICT 12% · STATE 2% · US 6%
Two+
739%
DISTRICT 9% · STATE 6% · US 5%
Native American
10%
DISTRICT 0% · STATE 0% · US 1%
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
Male
40451%
Female
38449%

School pathway

Feeds from
WYDOWN MIDDLE06–08
Based on grade levels within CLAYTON. Attendance zones can vary; confirm enrollment with the district.

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Test scores

MAP 2024-25 . % Proficient + Advanced
English Language Arts
82.7%
MO avg 44.9% . +13.4pp since 2021
Math
78.5%
MO avg 43.8% . +8.2pp since 2021

What this means: On the MAP, Missouri's statewide test, about 83 of every 100 students at this school read and write at grade level and about 79 of 100 do math at grade level. Across all Missouri schools, those numbers are about 45 and 44. Reading and writing scores are up about 13 points since 2021, while math scores are up about 8 points.

Performance levels, 2024-25

SubjectAdvancedProficientBasicBelow Basic
English Language Arts16.2%66.5%13.0%4.1%
Math59.8%18.7%13.3%8.0%
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 yearEnglish Language ArtsMath
2024-2582.7%78.5%
2023-2469.2%65.9%
2022-2372.0%63.9%
2021-2269.3%70.3%
% Proficient + Advanced, all students and all tested grades.
Source: MAP. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
71.1%
composite math + reading, all grades
Predicted
56.9%
based on MO schools with similar FRL share
Beats by
+14.2pp
above demographic expectation

What this means: About 71% of students here test proficient in math and reading, compared with the roughly 57% 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 CLAYTON HIGH

CLAYTON HIGH's state test result (71.1% proficient) is higher than 4 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
CLAYTON HIGH this school7888.0%71.1%
CENTRAL HIGH
CHESTERFIELD
1,28115.8%58.8%
LAFAYETTE SR. HIGH
WILDWOOD
1,66911.4%61.4%
SOUTH HIGH
MANCHESTER
1,48519.9%56.6%
WEST HIGH
BALLWIN
1,41710.7%71.3%
ROCK BRIDGE SR. HIGH
COLUMBIA
1,99717.9%54.0%
Matched among Missouri high 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 CLAYTON HIGH ranks

Among high schools
MeasureThis schoolIn MissouriIn St. Louis County
State test proficiency
ranked highest first
71.1%#6 of 443#2 of 31
Math proficiency
ranked highest first
78.5%#4 of 453
▲ 11
#1 of 34
▲ 1
Reading proficiency
ranked highest first
82.7%#5 of 382
▲ 15
#2 of 35
▲ 5
3-year test score change
ranked biggest gain first
+10.8pp#30 of 231#5 of 22
Enrollment
ranked largest first
788#118 of 561#26 of 45
Students per teacher
ranked fewest first
9.9:1#10 of 343#1 of 34
Diversity index
ranked most diverse first
60.7%#30 of 343#8 of 34
Free and reduced lunch
ranked highest share first
8.0%#452 of 455#35 of 36
Enrollment change since 2017-18
ranked steepest decline first
-10.1%#71 of 187#9 of 21
Ranked against other public high 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 2024-25
Enrollment
788
-120 (-13%) vs 2020
+20% since 1990-91, when it was 657
Student : Teacher
9.9:1
was 11.5:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-2578879.89.9:18% (63)
2023-2484477.710.9:18% (64)
2022-2383582.610.1:19% (73)
2020-219087911.5:110% (87)
2017-1887777.411.3:115% (130)
2015-168707811.2:111% (100)
2010-118458210.3:13% (26)
2000-017737410.4:19% (72)
1990-916575412.2:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for CLAYTON HIGH.

Since 2017-18: students down 10% (877 to 788); teachers up 3% (77.4 to 79.8).

About CLAYTON HIGH

CLAYTON HIGH is a large high school in CLAYTON, Missouri, administered by CLAYTON. Its enrollment is 788 students, spread over grades 9 through 12. Across high schools in Missouri, the average enrollment is about 501.

CLAYTON (5 schools, 2,367 students) runs CLAYTON HIGH.

About 59% of the student body at CLAYTON HIGH is White. The remaining students are 15% Black, 13% Asian, 9% multiracial, and 4% Hispanic. St. Louis County residents are about 62% White, a similar share. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 61%.

CLAYTON HIGH has 79.8 full-time-equivalent teachers on staff and a student-to-teacher ratio of 9.9:1. The school's 9.9:1 compares with an average of 12.2:1 for high schools in Missouri. The school has 8% of students eligible for free or reduced-price lunch. That is lower than the 43% average for public schools in St. Louis County.

Among Missouri public high schools, CLAYTON HIGH outscored 97%, which works out to an A+ on the allk12 Grade.

A school with CLAYTON HIGH's lunch-eligibility share in Missouri is predicted to score 56.9%. CLAYTON HIGH scores 71.1%, 14.2 points above that line.

Looking at the county, St. Louis County, 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. St. Louis County has 275 public schools with about 134,601 students, including CLAYTON HIGH.

CLAYTON HIGH's closest public school neighbor is JUVENILE DETENTION CTR., about 0.4 miles away. The five-mile area around CLAYTON HIGH holds at least 8 other public schools. CLAYTON HIGH's average proficiency of 71.1% compares with 64.3% for its nearest scored neighbors.

Under the NCES locale system, CLAYTON HIGH is Suburb: Large.

Between 2020-21 and 2024-25, CLAYTON HIGH had a net loss of 120 students, or 13%. The ratio of students to teachers went from 11.5:1 to 9.9:1 over the same years.

People can post here about open houses, carpools, and field trips and other school topics. Parents, students, alumni, and staff are welcome to post.

St. Louis County at a glance

View full county profile
Population
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

School name
CLAYTON HIGH
District
CLAYTON
Address
#1 MARK TWAIN CIRCLE, CLAYTON, MO 63105
Phone
(314) 854-6600
County
St. Louis County
Level
High
Grade range
09–12
Total enrollment
788
Teachers (FTE)
80
Student–teacher ratio
9.9:1
Free and reduced lunch
63 (8%)
Locale
21-Suburb: Large
NCES ID
290972000275
Charter school
No
Virtual school
No

Related schools

Other schools in CLAYTON
Other schools in CLAYTON
Other Clayton High schools

5 other US public schools in 6 states are named Clayton High. CLAYTON HIGH is the 2nd largest of the 6.

Nearby schools

Frequently asked questions

About CLAYTON HIGH
How many students attend CLAYTON HIGH?
CLAYTON HIGH enrolls approximately 788 students in grades 09-12.
What grades does CLAYTON HIGH serve?
CLAYTON HIGH serves grades 09-12.
What is the student-teacher ratio at CLAYTON HIGH?
The student-to-teacher ratio at CLAYTON HIGH is approximately 9.9:1 (80 FTE teachers).
What is the racial breakdown of students at CLAYTON HIGH?
At CLAYTON HIGH, the student body is approximately 59% White, 4% Hispanic, 15% Black, 13% Asian, 9% Two or more.
Is CLAYTON HIGH public or private?
CLAYTON HIGH is a public K-12 school, overseen by CLAYTON.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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