What standardized tests are used?

Each state administers its own standardized assessments for English Language Arts and Math, typically in grades 3-8. High school students may take the ACT, SAT, or a state-specific exam. Results are reported as the percentage of students meeting or exceeding grade-level expectations.

How should I interpret proficiency percentages?

Proficiency rates show the percentage of students meeting grade-level expectations. A 60% proficiency rate means 6 out of 10 students tested at or above grade level. Compare against state averages and similar districts for context, as raw numbers alone do not tell the full story.

What are accountability designations?

Under the Every Student Succeeds Act (ESSA), schools receive designations based on performance. 'Exemplary' schools perform well above average. 'Commendable' schools meet targets. Schools identified for 'Targeted' or 'Comprehensive' support need improvement in specific areas or overall performance.

Northbrook, IL School Test Scores & Graduation Rates

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School Performance — 2025i

NCES

How students at each school are performing on state assessments. 85.5% meet ELA standards on the state assessment for grades 3-8. Chronic absenteeism (missing 10%+ of school days) is at 13.1%.

Avg Graduation Ratei

95.7%

ELA Proficiencyi

85.5%

Math Proficiencyi

79.3%

Chronic Absenteeismi

13.1%

District Summaryi

Glenbrook HSD 225

Grad Rate: 95.7%Absent: 16.7%ACT: ELA 23.9, Math 25.3College: 88.4%

Northbrook SD 28

ELA: 87.9%Math: 81.9%Absent: 9.5%

Proficiency by Gradei

Grade 3

ELA

82%

Math

88.8%

Grade 4

ELA

88.6%

Math

84.3%

Grade 5

ELA

86.5%

Math

76.6%

Grade 6

ELA

91.5%

Math

76.3%

Grade 7

ELA

88.7%

Math

83.1%

Grade 8

ELA

89.8%

Math

82.9%

Northbrook ESD 27

ELA: 88.8%Math: 81.8%Absent: 10.8%

Proficiency by Gradei

Grade 3

ELA

87.9%

Math

79%

Grade 4

ELA

93.1%

Math

84%

Grade 5

ELA

84.9%

Math

79.5%

Grade 6

ELA

91.4%

Math

79.6%

Grade 7

ELA

92.9%

Math

89.4%

Grade 8

ELA

82.9%

Math

80.1%

Northbrook/Glenview SD 30

ELA: 88.8%Math: 86.2%Absent: 7.4%

Proficiency by Gradei

Grade 3

ELA

85.5%

Math

89.2%

Grade 4

ELA

86.3%

Math

88.2%

Grade 5

ELA

83.3%

Math

80.6%

Grade 6

ELA

93.6%

Math

88.6%

Grade 7

ELA

94.3%

Math

90.8%

Grade 8

ELA

89.4%

Math

80.7%

West Northfield SD 31

ELA: 72.8%Math: 62.7%Absent: 12.2%

Proficiency by Gradei

Grade 3

ELA

63.6%

Math

71.8%

Grade 4

ELA

56.4%

Math

55.5%

Grade 5

ELA

75.2%

Math

61.9%

Grade 6

ELA

73.4%

Math

60.6%

Grade 7

ELA

79.4%

Math

62.7%

Grade 8

ELA

88.7%

Math

63.5%

Performance by School (14)i

Elementary Schools

Middle Schools

High Schools

Northbrook, IL School Test Scores & Graduation Rates