What does the student-to-teacher ratio tell me?

The student-to-teacher ratio is the number of students divided by the number of full-time equivalent (FTE) teachers. Lower ratios generally mean smaller class sizes and more individual attention, though the ratio does not directly equal class size since teachers have planning periods and may teach specialized subjects.

What types of staff are included?

School staff includes classroom teachers, special education teachers, instructional aides, counselors, administrators, librarians, nurses, social workers, psychologists, and support staff. The staffing breakdown shows how the district allocates its workforce across these roles.

Where does school staffing data come from?

Staffing data is reported annually by school districts to the state Board of Education as part of the School Report Card. It includes full-time equivalent counts, teacher qualifications, experience levels, and salary information.

Blue Island, IL

CSAChicago-Naperville MSAChicago-Naperville-Elgin#96/341 Population

Select Your District

Your assigned district depends on your home address within town.

NCES

School Staff — 2025i

NCES

Who teaches and supports students in your school districts. The median household income here is $59K, providing context for local cost of living.

Student:Teacheri

17.2:1

Avg Teacher Salaryi

$92K

Local Median Incomei

$59K

By District

CHSD 218High School District · 5,367 students

Teachers earn an average of $108K. 95.2% returned from the prior year.

Staff Breakdowni

422 total FTE

398 Teachers (94%)

24 Counselors (6%)

Teachers

Student:Teacher

17:1

Avg Salary

$108K

16.2 yrs avg experience

Retention ratei95.2%

Attendance ratei95.2%

Administration

Avg Salary

$138K

Support Staff

Counselorsi

1 per 224 students

Teacher Credentials

Novice teachersi2.7%

Out-of-fieldi5.9%

Provisional licensei1.5%

Bremen CHSD 228High School District · 4,666 students

Teachers earn an average of $104K. 93.2% returned from the prior year.

Staff Breakdowni

329 total FTE

307 Teachers (93%)

22 Counselors (7%)

Teachers

Student:Teacher

19:1

Avg Salary

$104K

16 yrs avg experience

Retention ratei93.2%

Attendance ratei93.2%

Administration

Avg Salary

$157K

Support Staff

Counselorsi

1 per 212 students

Teacher Credentials

Novice teachersi3.9%

Out-of-fieldi5.2%

Provisional licensei0.3%

Thornton Twp HSD 205High School District · 4,255 students

Teachers earn an average of $101K. 91.9% returned from the prior year.

Staff Breakdowni

361 total FTE

342 Teachers (95%)

19 Counselors (5%)

Teachers

Student:Teacher

16:1

Avg Salary

$101K

15.9 yrs avg experience

Retention ratei91.9%

Attendance ratei91.9%

Administration

Avg Salary

$137K

Support Staff

Counselorsi

1 per 224 students

Teacher Credentials

Novice teachersi3%

Out-of-fieldi7.4%

Provisional licensei0.9%

Cook County SD 130Elementary District · 2,897 students

Teachers earn an average of $64K. 83.3% returned from the prior year.

Staff Breakdowni

245 total FTE

237 Teachers (97%)

8 Counselors (3%)

Teachers

Student:Teacher

14:1

Avg Salary

$64K

12.2 yrs avg experience

Retention ratei83.3%

Attendance ratei83.3%

Administration

Avg Salary

$102K

Support Staff

Counselorsi

8.3

1 per 349 students

Teacher Credentials

Novice teachersi5.7%

Out-of-fieldi9.8%

Provisional licensei3.2%

Posen-Robbins ESD 143-5Elementary District · 1,253 students

Teachers earn an average of $64K. 86.3% returned from the prior year.

Staff Breakdowni

84 total FTE

82 Teachers (98%)

2 Counselors (2%)

Teachers

Student:Teacher

18:1

Avg Salary

$64K

12.8 yrs avg experience

Retention ratei86.3%

Attendance ratei86.3%

Administration

Avg Salary

$136K

Support Staff

Counselorsi

1 per 627 students

Teacher Credentials

Novice teachersi4.8%

Out-of-fieldi24.1%

Provisional licensei3.6%

Calumet Public SD 132Elementary District · 852 students

Teachers earn an average of $57K. 76.9% returned from the prior year.

Staff Breakdowni

46 total FTE

45 Teachers (98%)

1 Counselors (2%)

Teachers

Student:Teacher

21:1

Avg Salary

$57K

10.6 yrs avg experience

Retention ratei76.9%

Attendance ratei76.9%

Administration

Avg Salary

$123K

Support Staff

Counselorsi

1 per 852 students

Teacher Credentials

Novice teachersi23%

Out-of-fieldi7.1%

Provisional licensei6.7%

W Harvey-Dixmoor PSD 147Elementary District · 782 students

Teachers earn an average of $55K. 66.4% returned from the prior year.

Teachers

Student:Teacher

21:1

Avg Salary

$55K

10.5 yrs avg experience

Retention ratei66.4%

Attendance ratei66.4%

Administration

Avg Salary

$104K

Teacher Credentials

Novice teachersi21.7%

Out-of-fieldi35.2%

Provisional licensei10.1%