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SCHOOL COMMUNITY·ARLINGTON HEIGHTS SD 25·NCES 170414000106

Thomas Middle School

1430 N Belmont Ave, Arlington Heights, IL 60004 · (847) 398-4260 · Cook County
GRADES 06–08MIDDLE21-SUBURBREGULAR SCHOOL1,024 STUDENTS
Enrollment
1,024
Middle
DISTRICT 918 · STATE 462
Student : Teacher
13.3:1
77 FTE teachers
DISTRICT 12.7:1 · STATE 13.0:1
Free / Reduced Lunch
16%
164 students
DISTRICT 16% · STATE 56%
Community
5
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 632732%
Grade 735334%
Grade 834434%
Student demographics
47%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 42% · STATE 69% · US 70%
White
72271%
DISTRICT 74% · STATE 45% · US 43%
Hispanic
949%
DISTRICT 10% · STATE 29% · US 30%
Black
162%
DISTRICT 1% · STATE 16% · US 15%
Asian
17417%
DISTRICT 14% · STATE 6% · US 6%
Two+
61%
DISTRICT 0% · STATE 5% · US 5%
Native American
20%
DISTRICT 0% · STATE 0% · US 1%
Pacific Islander
101%
DISTRICT 0% · STATE 0% · US 0%
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
53052%
Female
49448%

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Test scores

IAR + ISA 2024-25 . % Proficient (Levels 4-5)
English Language Arts
79.1%
IL avg 51.0% . +20.0pp since 2023
Math
59.7%
IL avg 37.9% . +11.5pp since 2023

What this means: On the IAR + ISA, Illinois's statewide test, about 79 of every 100 students at this school read and write at grade level and about 60 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 20 points since 2023, while math scores are up about 12 points.

IAR + ISA results by year

School yearEnglish Language ArtsMath
2024-2579.1%59.7%
2023-2459.1%48.2%
% Proficient (Levels 4-5), all students and all tested grades.
Source: IAR + ISA. 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
69.9%
composite math + reading, all grades
Predicted
62.3%
based on IL schools with similar FRL share
Beats by
+7.6pp
above demographic expectation

What this means: About 70% of students here test proficient in math and reading, compared with the roughly 62% typical for Illinois 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 Illinois'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 Thomas Middle School

Thomas Middle School's state test result (69.9% proficient) is higher than 2 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
Thomas Middle School this school1,02416.0%69.9%
Prairie Knolls Middle School
Elgin
77016.8%67.0%
Barrington Middle School Station
Barrington
88619.4%65.8%
Wredling Middle School
Saint Charles
1,28919.6%72.5%
Madison Jr High School
Naperville
56616.4%70.5%
Barrington Mdle School- Prairie Cmps
Barrington
98020.2%72.4%
Matched among Illinois middle 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 Thomas Middle School ranks

Among middle schools
MeasureThis schoolIn IllinoisIn Cook County
State test proficiency
ranked highest first
69.9%#31 of 578#8 of 116
Math proficiency
ranked highest first
59.7%#78 of 640
▲ 16
#25 of 146
▲ 6
Reading proficiency
ranked highest first
79.1%#81 of 640
▲ 123
#26 of 146
▲ 22
Enrollment
ranked largest first
1,024#26 of 691#7 of 148
Students per teacher
ranked fewest first
13.3:1#305 of 558#87 of 138
Diversity index
ranked most diverse first
46.5%#289 of 560#80 of 138
Free and reduced lunch
ranked highest share first
16.0%#554 of 581#113 of 117
Enrollment change since 2017-18
ranked fastest growth first
+5.1%#82 of 127#28 of 40
Ranked against other public middle 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
1,024
+80 (+8%) vs 2020
+46% since 1990-91, when it was 703
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-251,02477.213.3:116% (164)
2023-2499270.214.1:115% (149)
2022-2396172.113.3:114% (139)
2020-21944N/AN/AN/A
2017-1897472.713.4:110% (97)
2015-169487013.5:16% (53)
2010-118426113.8:19% (73)
2000-018355814.4:1N/A
1990-917034814.7:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for Thomas Middle School.

Since 2017-18: students up 5% (974 to 1,024); teachers up 6% (72.7 to 77.2).

About Thomas Middle School

Thomas Middle School is a high-enrollment middle-grades school in Arlington Heights, Illinois, under Arlington Heights SD 25. There are 1,024 students enrolled, covering grades 6 through 8. That puts enrollment 122% bigger than the 462-student average for middle schools in Illinois.

Thomas Middle School is part of Arlington Heights SD 25, where 9 schools serve 5,423 students.

Federal enrollment data show Thomas Middle School is 71% White. Other groups make up 17% Asian and 9% Hispanic. Cook County as a whole is about 44% White, so the school's share is higher. A diversity index of 47% means there is a 47% chance two randomly chosen students at Thomas Middle School are from different groups.

Teacher count: 77.2 full-time equivalents. Student-to-teacher ratio: 13.3:1. The average for middle schools in Illinois is about 13.0:1. Roughly 16% of students come from households that qualify for free or reduced-price lunch. The average for public schools in Cook County is 66%.

When test results are adjusted for free or reduced-price lunch eligibility, Thomas Middle School is 7.6 points above its prediction. Actual: 69.9%. Predicted: 62.3%.

In the wider Cook County area, the median household earns about $83,498 a year, a bachelor's degree or higher is held by about 43% of adults, and the share of residents below the poverty line is 10%. Thomas Middle School shares Cook County with 1,405 other public schools.

Olive-Mary Stitt School is the nearest public school to Thomas Middle School, about 0.2 miles away. Thomas Middle School is one of several public schools in the area, with at least 8 others within five miles. The nearest schools with test data average 69.3%, lower than Thomas Middle School's 69.9%.

Its NCES locale code is Suburb: Large: the school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.

An 8% rise took enrollment from 944 in 2020-21 to 1,024 in 2024-25.

On allk12, people connected to Thomas Middle School can post about special education services, counseling, and support programs. Members of the school community can share what they know.

Cook County at a glance

View full county profile
Population
5,182,090
Census ACS
Median income
$83,498
Household, ACS
Bachelor's+
43%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
1,406
697,934 students

Quick facts

School name
Thomas Middle School
District
Arlington Heights SD 25
Address
1430 N Belmont Ave, Arlington Heights, IL 60004
Phone
(847) 398-4260
County
Cook County
Level
Middle
Grade range
06–08
Total enrollment
1,024
Teachers (FTE)
77
Student–teacher ratio
13.3:1
Free and reduced lunch
164 (16%)
Locale
21-Suburb: Large
NCES ID
170414000106
Charter school
No
Virtual school
No

Related schools

Other schools in Arlington Heights SD 25
Other schools in Arlington Heights
Other Thomas Middle schools

2 other US public schools in 3 states are named Thomas Middle. Thomas Middle School is the largest of the 3.

Nearby schools

Frequently asked questions

About Thomas Middle School
How large is Thomas Middle School?
Thomas Middle School enrolls approximately 1,024 students in grades 06-08.
What age range does Thomas Middle School serve?
Thomas Middle School serves students from grade 06 through grade 08.
What is the student-teacher ratio at Thomas Middle School?
The student-to-teacher ratio at Thomas Middle School is approximately 13.3:1 (77 FTE teachers).
What is the racial breakdown of students at Thomas Middle School?
At Thomas Middle School, the student body is approximately 71% White, 9% Hispanic, 2% Black, 17% Asian, 1% Two or more.
Who oversees Thomas Middle School?
Thomas Middle School is overseen by Arlington Heights SD 25 in Cook County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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