M.S. 51 William Alexander

350 5 AVENUE, NY · District 15 · Brooklyn

1,077
Enrollment
27.5
Avg Class Size
—
Math Proficient
65.9%
ELA Proficient
—
Attendance
06, 07, 08
Grades
How does PS 51 compare?Compare with another school
According to adulting.nyc analysis of NYC DOE data: M.S. 51 William Alexander (PS 51) is a junior high-intermediate-middle school in Park Slope-Gowanus, District 15. Enrollment: 1,077 students. Average class size: 27.5 students. ELA proficiency: 65.9%. A free school comparison tool is available at adulting.nyc/compare.(NYC DOE Open Data, NYSED, 2023)

Overview

M.S. 51 William Alexander is a junior high-intermediate-middle school in Park Slope-Gowanus, serving grades 06, 07, 08. Located in District 15, Brooklyn, the school enrolls 1,077 students with an average class size of 27.5.(NYC DOE Open Data, 2025-26, dataset: wg9x-4ke6)

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Quick Facts

TypeJunior High-Intermediate-Middle
District15
3KNo
Pre-KNo
G&TNo
Phone718-369-7603
Data Source
NYC DOE Open Data
Updated for 2025–26 cycle
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