Summary:
Northbrook has 11 schools: six elementary schools, four middle schools serving grades 6–8, and one high school. The clearest area-wide finding is that all nine elementary and middle schools with All Grades IAR results score above Illinois in both ELA and math. Their equal-school averages are 86% in ELA and 82% in math, compared with state rates of 56% and 40%, respectively—a 30-point ELA advantage and a 43-point math advantage.
Wescott Elementary leads the elementary group, with 91% in both ELA and math—about 8 points above the average of the other elementary schools in each subject. Among middle schools, Maple School and Wood Oaks Junior High tie for top ELA at 91%; Maple leads math at 87%. At the lower end, Greenbriar Elementary scores 80% in ELA and 78% in math, while Field School scores 81% and 68%—still 25 and 29 points above state rates. Glenbrook North High School also stands out: its 11th-grade ACT proficiency is 87% in ELA, 86% in math and 87% in science, each well above the state.
Results have moved in different directions: from 2024–25 to 2025–26, the nine-school average fell by 1 point in ELA while the state-relative gap narrowed from 34 to 30 points; the average rose by 1 point in math, and its state-relative gap edged up from 42 to 43 points. Wescott gained 6 ELA points, Westmoor Elementary fell 10, and Field gained 6 math points. SchoolDigger gives five stars to schools with ranking histories; enrollment and student-teacher ratios do not neatly track scores, with ratios ranging from 8.4 to 13 in 2024–25. The reported free/reduced lunch eligible measure for 2021–22 is highest at Field, at 18%; Hickory Point Elementary reports 1% but has no supplied test scores.
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