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.

Northbrook, IL School Staffing — Teacher Counts & Ratios

Select Your District

Your assigned district depends on your home address within town.

School Staff — 2025i

NCES

Who teaches and supports students in your school districts. 955 teachers serve across all districts. The median household income here is $158K, providing context for local cost of living.

Teachersi

955

Student:Teacheri

14.2:1

Avg Teacher Salaryi

$111K

Local Median Incomei

$158K

By District

Glenbrook HSD 225High School District · 4,975 students

This district employs 420 teachers with an average salary of $128K. 94.5% returned from the prior year.

Staff Breakdowni

498 total FTE

394 Teachers (79%)

25 Counselors (5%)

9 Social Workers (2%)

15 Psychologists (3%)

3 Nurses (1%)

53 Admin (11%)

Teachers

Headcount

420

393.5 FTE

Student:Teacher

15:1

Avg Salary

$128K

16.7 yrs avg experience

Retention ratei94.5%

Attendance ratei94.5%

Administration

Avg Salary

$186K

Student:Admin

94:1

Principal Turnover

in past 6 years

Support Staff

Counselorsi

24.5

1 per 203 students

Nursesi

2.9

1 per 1716 students

Psychologistsi

14.9

1 per 334 students

Social Workersi

1 per 553 students

Teacher Credentials

Novice teachersi2%

Out-of-fieldi8%

Provisional licensei0.5%

Northbrook SD 28Elementary District · 1,817 students

This district employs 193 teachers with an average salary of $98K. 94.3% returned from the prior year.

Staff Breakdowni

226 total FTE

189 Teachers (84%)

11 Social Workers (5%)

6 Psychologists (3%)

4 Nurses (2%)

16 Admin (7%)

Teachers

Headcount

193

188.7 FTE

Student:Teacher

13:1

Avg Salary

$98K

16.2 yrs avg experience

Retention ratei94.3%

Attendance ratei94.3%

Administration

Avg Salary

$159K

Student:Admin

115:1

Principal Turnover

in past 6 years

Support Staff

Nursesi

1 per 454 students

Psychologistsi

1 per 303 students

Social Workersi

1 per 165 students

Teacher Credentials

Novice teachersi0.5%

Out-of-fieldi0.6%

Provisional licensei0.5%

Northbrook ESD 27Elementary District · 1,311 students

This district employs 123 teachers with an average salary of $105K. 94.9% returned from the prior year.

Staff Breakdowni

140 total FTE

119 Teachers (85%)

1 Counselors (1%)

4 Social Workers (3%)

3 Psychologists (2%)

1 Nurses (1%)

12 Admin (9%)

Teachers

Headcount

123

119.1 FTE

Student:Teacher

13:1

Avg Salary

$105K

15.8 yrs avg experience

Retention ratei94.9%

Attendance ratei94.9%

Administration

Avg Salary

$164K

Student:Admin

109:1

Principal Turnover

in past 6 years

Support Staff

Counselorsi

1 per 1311 students

Nursesi

1 per 1311 students

Psychologistsi

2.8

1 per 468 students

Social Workersi

1 per 328 students

Teacher Credentials

Novice teachersi0.8%

Out-of-fieldi1.2%

Northbrook/Glenview SD 30Elementary District · 1,245 students

This district employs 119 teachers with an average salary of $96K. 91.8% returned from the prior year.

Staff Breakdowni

137 total FTE

117 Teachers (85%)

3 Social Workers (2%)

6 Psychologists (4%)

12 Admin (9%)

Teachers

Headcount

119

116.7 FTE

Student:Teacher

14:1

Avg Salary

$96K

14.8 yrs avg experience

Retention ratei91.8%

Attendance ratei91.8%

Administration

Avg Salary

$186K

Student:Admin

104:1

Principal Turnover

in past 6 years

Support Staff

Psychologistsi

1 per 208 students

Social Workersi

2.6

1 per 479 students

Teacher Credentials

Novice teachersi2.6%

Out-of-fieldi0.2%

West Northfield SD 31Elementary District · 1,003 students

This district employs 100 teachers with an average salary of $83K. 88.4% returned from the prior year.

Staff Breakdowni

115 total FTE

100 Teachers (87%)

4 Social Workers (3%)

1 Psychologists (1%)

10 Admin (9%)

Teachers

Headcount

100

99.5 FTE

Student:Teacher

14:1

Avg Salary

$83K

13.2 yrs avg experience

Retention ratei88.4%

Attendance ratei88.4%

Administration

Avg Salary

$145K

Student:Admin

102:1

Principal Turnover

in past 6 years

Support Staff

Psychologistsi

1 per 1003 students

Social Workersi

1 per 251 students

Teacher Credentials

Novice teachersi6%

Provisional licensei3%