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What's one thing Thornridge High School gets right about preparing students for what comes next?
Community prompt from u/allk12. Replies below.
Enrollment
969
High
DISTRICT 1,503 · STATE 834
SCHOOL COMMUNITY·THORNTON TWP HSD 205·NCES 173897003954
Thornridge High School
15000 Cottage Grove Ave, Dolton, IL 60419 · (708) 271-4401 · Cook County
GRADES 09–12HIGH21-SUBURBTITLE IREGULAR SCHOOL969 STUDENTS
C-
allk12 Grade
Scored higher than 16% of Illinois public high schools
- DTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- C+Beats 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 high schools
Student : Teacher
15.4:1
63 FTE teachers
DISTRICT 14.2:1 · STATE 13.8:1
Free / Reduced Lunch
86%
835 students
DISTRICT 83% · STATE 56%
Community
5
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
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 248 | 26% |
| Grade 10 | 224 | 23% |
| Grade 11 | 238 | 25% |
| Grade 12 | 259 | 27% |
Student demographics
20%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 37% · STATE 69% · 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
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
11.6%
composite math + reading, all grades
Predicted
21.8%
based on IL schools with similar FRL share
Beats by
-10.2pp
below demographic expectation
What this means: About 12% of students here test proficient in math and reading, compared with the roughly 22% 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 Thornridge High School
Thornridge High School's state test result (11.6% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Thornridge High School this school | 969 | 86.2% | 11.6% |
| Noble St Chtr-Comer College Prep Chicago | 1,007 | 86.1% | 22.3% |
| Noble St Chtr-Butler - Crimson Chicago | 695 | 88.8% | 13.1% |
| King College Prep High School Chicago | 819 | 82.8% | 23.6% |
| Chicago Vocational Career Academy High School Chicago | 673 | 91.8% | 4.3% |
| Englewood STEM High School Chicago | 778 | 84.2% | 4.0% |
Matched among Illinois 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 Thornridge High School ranks
Among high schools| Measure | This school | In Illinois | In Cook County |
|---|---|---|---|
| State test proficiency ranked highest first | 11.6% | #506 of 573 | #112 of 170 |
| Enrollment ranked largest first | 969 | #226 of 708 | #95 of 206 |
| Students per teacher ranked fewest first | 15.4:1 | #358 of 528 | #103 of 173 |
| Diversity index ranked most diverse first | 20.1% | #366 of 537 | #129 of 180 |
| Free and reduced lunch ranked highest share first | 86.2% | #86 of 578 | #76 of 171 |
| Enrollment change since 2017-18 ranked steepest decline first | -17.3% | #75 of 358 | #39 of 101 |
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 2024-25Enrollment
969
-147 (-13%) vs 2020
-43% since 1990-91, when it was 1,713
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 | 969 | 63 | 15.4:1 | 86% (835) |
| 2023-24 | 978 | 63.3 | 15.4:1 | 80% (782) |
| 2022-23 | 1,057 | 72 | 14.7:1 | 61% (649) |
| 2020-21 | 1,116 | N/A | N/A | N/A |
| 2017-18 | 1,172 | 100.6 | 11.7:1 | 56% (653) |
| 2015-16 | 1,242 | 102 | 12.2:1 | 94% (1,162) |
| 2010-11 | 1,516 | 106 | 14.3:1 | 77% (1,169) |
| 2000-01 | 1,735 | 127 | 13.7:1 | N/A |
| 1990-91 | 1,713 | 111 | 15.4:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Thornridge High School.
Since 2017-18: students down 17% (1,172 to 969); teachers down 37% (100.6 to 63).
About Thornridge High School
At 15000 Cottage Grove Ave in Dolton, Illinois, Thornridge High School operates as a mid-sized high school. The school serves grades 9 through 12. Enrollment is 969 students.
Thornton Twp HSD 205 is responsible for 3 schools, Thornridge High School included, with 4,509 students in all.
Black students are 89% of those enrolled at Thornridge High School. Next come 8% Hispanic and 2% multiracial. That compares with about 22% Black among all Cook County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 20%.
The school's 63 full-time-equivalent teachers translate to a student-to-teacher ratio of 15.4:1. High schools in Illinois average 13.8:1, 1.6 fewer students per teacher than here. Income data for the school show 86% of students eligible for free or reduced-price lunch. Public schools in Cook County average 66%.
Among Illinois public high schools, Thornridge High School outscored 16%, which works out to a C- on the allk12 Grade.
Thornridge High School is 10.2 points below its predicted average proficiency rate across its state test results (11.6% versus 21.8%), which places it in neither the top nor the bottom 10% in Illinois.
American Community Survey estimates for Cook County show that median household income comes to about $83,498, a bachelor's degree or higher is held by about 43% of adults, and the poverty rate is about 10%. The county's public schools total 1,406, with about 697,934 students.
Thornridge High School's nearest public school is Franklin Elementary School (about 0.6 miles). Inside a five-mile radius, there are at least 8 other public schools. The average proficiency across nearby scored schools is 20.8%; Thornridge High School's is 11.6%, ranking 8th of 8.
The federal government classifies Thornridge High School's location as Suburb: Large.
The school shrank from 1,116 students in 2020-21 to 969 in 2024-25.
Use the discussion section to ask about special education services, counseling, and support programs at Thornridge High School. You can also rate the school on this page.
Cook County at a glance
View full county profilePopulation
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
Related schools
Other schools in Thornton Twp HSD 205
- Thornwood High SchoolHigh · 1,843 students
- Thornton Township High SchoolHigh · 1,697 students
- Outlook AcademyHigh
- PEACE CenterHigh
Other schools in Dolton
- Lincoln Elementary SchoolElementary · 342 students
- Berger-Vandenberg Elementary SchoolElementary · 266 students
- Franklin Elementary SchoolElementary · 259 students
- Roosevelt Elementary SchoolElementary · 248 students
- Diekman Elementary SchoolElementary · 227 students
- Early Childhood CntrElementary · 196 students
Nearby schools
- Franklin Elementary School0.6 mi · 259
- Berger-Vandenberg Elementary School0.7 mi · 266
- Madison School0.8 mi · 277
- Diekman Elementary School0.8 mi · 227
- Eisenhower School1.2 mi · 274
- Lincoln Elementary School1.3 mi · 342
Frequently asked questions
About Thornridge High SchoolHow many students attend Thornridge High School?
Thornridge High School enrolls approximately 969 students in grades 09-12.
Is Thornridge High School an elementary, middle, or high school?
Thornridge High School is a high school covering grades 09-12.
What is the student-teacher ratio at Thornridge High School?
The student-to-teacher ratio at Thornridge High School is approximately 15.4:1 (63 FTE teachers).
How diverse is Thornridge High School?
Thornridge High School reports a student body of 1% White, 8% Hispanic, 89% Black, 2% Two or more.
Who oversees Thornridge High School?
Thornridge High School is overseen by Thornton Twp HSD 205 in Cook County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.