The bulletin board for America's public schools. Parents, teachers, students, and staff. One community per school.
SCHOOL COMMUNITY·ARLINGTON HEIGHTS SD 25·NCES 170414000105

South Middle School

400 S Highland Ave, Arlington Heights, IL 60005 · (847) 398-4250 · Cook County
GRADES 06–08MIDDLE21-SUBURBREGULAR SCHOOL812 STUDENTS
A-
allk12 Grade
Scored higher than 77% of Illinois public middle schools
  • ATest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
  • BBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
  • ·Three-year trend Not available for this school, so the grade uses the other parts.

Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Illinois public middle schools

Enrollment
812
Middle
DISTRICT 918 · STATE 462
Student : Teacher
12.1:1
67 FTE teachers
DISTRICT 12.7:1 · STATE 13.0:1
Free / Reduced Lunch
16%
127 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 628235%
Grade 725732%
Grade 827334%
Student demographics
29%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 42% · STATE 69% · US 70%
White
67984%
DISTRICT 74% · STATE 45% · US 43%
Hispanic
739%
DISTRICT 10% · STATE 29% · US 30%
Black
81%
DISTRICT 1% · STATE 16% · US 15%
Asian
506%
DISTRICT 14% · STATE 6% · US 6%
Two+
10%
DISTRICT 0% · STATE 5% · US 5%
Pacific Islander
10%
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
39248%
Female
42052%

Discussions

+ POST

Test scores

IAR + ISA 2024-25 . % Proficient (Levels 4-5)
English Language Arts
74.2%
IL avg 51.0% . +1.8pp since 2023
Math
51.8%
IL avg 37.9% . +4.1pp since 2023

What this means: On the IAR + ISA, Illinois's statewide test, about 74 of every 100 students at this school read and write at grade level and about 52 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 2 points since 2023, while math scores are up about 4 points.

IAR + ISA results by year

School yearEnglish Language ArtsMath
2024-2574.2%51.8%
2023-2472.4%47.7%
% 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
65.9%
composite math + reading, all grades
Predicted
62.5%
based on IL schools with similar FRL share
Beats by
+3.4pp
above demographic expectation

What this means: About 66% 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 South Middle School

South Middle School's state test result (65.9% proficient) is higher than 1 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
South Middle School this school81215.6%65.9%
Old Quarry Middle School
Lemont
85619.7%74.2%
Lake Zurich Middle - S Campus
Lake Zurich
59915.4%78.8%
Herrick Middle School
Downers Grove
62610.5%73.3%
Liberty Middle School
Edwardsville
88819.3%55.8%
Lincoln Jr High School
Naperville
77414.0%73.8%
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 South Middle School ranks

Among middle schools
MeasureThis schoolIn IllinoisIn Cook County
State test proficiency
ranked highest first
65.9%#61 of 578#12 of 116
Math proficiency
ranked highest first
51.8%#131 of 640
▼ 32
#40 of 146
▼ 6
Reading proficiency
ranked highest first
74.2%#135 of 640
▼ 59
#39 of 146
▼ 15
Enrollment
ranked largest first
812#80 of 691#19 of 148
Students per teacher
ranked fewest first
12.1:1#187 of 558#66 of 138
Diversity index
ranked most diverse first
28.9%#409 of 560#112 of 138
Free and reduced lunch
ranked highest share first
15.6%#559 of 581#115 of 117
Enrollment change since 2017-18
ranked steepest decline first
-10.2%#242 of 440#57 of 97
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
812
-20 (-2%) vs 2020
+29% since 1990-91, when it was 630
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-2581267.312.1:116% (127)
2023-2481367.512.0:116% (130)
2022-2385067.512.6:116% (137)
2020-21832N/AN/AN/A
2017-1890465.813.8:111% (100)
2015-168316812.2:17% (59)
2010-118916114.6:111% (98)
2000-018516014.2:1N/A
1990-916304015.8:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for South Middle School.

Since 2017-18: students down 10% (904 to 812); teachers up 2% (65.8 to 67.3).

About South Middle School

South Middle School is a middle-grades school in Arlington Heights, Illinois, according to federal school records. Its 812 students are spread across grades 6 through 8. The school's enrollment is 76% bigger than the 462 average for middle schools in Illinois.

Arlington Heights SD 25 enrolls 5,423 students in 9 schools, including South Middle School.

White students make up 84% of enrollment at South Middle School. Other students are 9% Hispanic and 6% Asian. That is higher than the 44% White share among all Cook County residents. Pick two students at random and there is a 29% chance they belong to different racial or ethnic groups; that figure is the school's diversity index.

The school employs the equivalent of 67.3 full-time teachers, for a ratio of 12.1:1. That is 0.9 students per teacher below the 13.0:1 average for middle schools in Illinois. The free or reduced-price lunch rate at South Middle School is 16%. For comparison, public schools in Cook County average 66%.

Measured against Illinois public middle schools, South Middle School receives an A-. The grade weighs proficiency most heavily, then how results compare with what the school's low-income share predicts, then the three-year change.

Schools in Illinois with a similar free or reduced-price lunch share are predicted to score about 62.5%. South Middle School scores 65.9%.

Within Cook County, the median household income is $83,498, 43% of adults hold a bachelor's degree or higher, and about 10% of residents live below the federal poverty line. Besides South Middle School, Cook County has 1,405 other public schools.

Of nearby public schools, Westgate Elementary School is the closest, at about 0.6 miles. In all, at least 8 other public schools sit within five miles of South Middle School. Among its closest neighbors with test data, South Middle School is 4th of 8 on proficiency.

NCES describes the area around South Middle School as Suburb: Large, meaning in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.

The school's size has been steady, with 832 students in 2020-21 and 812 in 2024-25.

Conversations here can range across enrollment questions, class placement, and PTA news. Reviews and ratings from people who know the school are welcome.

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
South Middle School
District
Arlington Heights SD 25
Address
400 S Highland Ave, Arlington Heights, IL 60005
Phone
(847) 398-4250
County
Cook County
Level
Middle
Grade range
06–08
Total enrollment
812
Teachers (FTE)
67
Student–teacher ratio
12.1:1
Free and reduced lunch
127 (16%)
Locale
21-Suburb: Large
NCES ID
170414000105
Charter school
No
Virtual school
No

Related schools

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

17 other US public schools in 14 states are named South Middle. South Middle School is the 5th largest of the 18.

Nearby schools

Frequently asked questions

About South Middle School
How many students attend South Middle School?
South Middle School enrolls approximately 812 students in grades 06-08.
Is South Middle School an elementary, middle, or high school?
South Middle School is a middle school covering grades 06-08.
How many teachers does South Middle School have?
South Middle School employs 67 FTE teachers, for a student-to-teacher ratio of 12.1:1.
What is the student diversity at South Middle School?
Student demographics at South Middle School are roughly 84% White, 9% Hispanic, 1% Black, 6% Asian, 0% Two or more.
Who oversees South Middle School?
South 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.
+ Post