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Building 21

Building 21 is a public high school in Philadelphia, PA, serving grades 9–12, rated F, with 371 students and a 20.5:1 student-teacher ratio.

In 2024-2025, the share of students meeting the state standard was 24% in Literature, 3% in Algebra I and 3% in Biology.

FTopHap school rating
Rating
F
Grades
9–12
Enrollment
371
Students per teacher
20.5:1
Level
High
Type
Public · Regular

2024-2025 testing year

State test results

Share of students meeting or exceeding the state standard.

Literature24%
Algebra I3%
Biology3%

Student body

Black91%
Hispanic5%
Two or more races2%
Asian1%
White0%
Male / female
54% / 46%
Free or reduced lunch
103%
Enrollment change vs prior year
+6.0%
Prior-year enrollment
350

School details

Address
6501 Limekiln Pike, Philadelphia, PA 19138
Phone
(215) 400-7450
Website
philasd.org
Setting
City - Large
Status
Operational
NCES ID
421899007534
Visit the school website

School district

Philadelphia City School District

District rating
C+
Schools
220
Students
120,057
Spending per student
$17,593
Teachers (FTE)
8,000
Grades
PK–12
See every school in Philadelphia City School District

Other schools in this district

Common questions

About Building 21

How is Building 21 rated?

Building 21 holds a F rating on TopHap's A-to-D scale, which blends state test results, academic progress and student outcomes. Philadelphia City School District is rated C+ overall.

How do students at Building 21 perform on state tests?

In the 2024-2025 testing year, the share of Building 21 students meeting or exceeding the state standard was 24% in Literature, 3% in Algebra I and 3% in Biology.

What grades does Building 21 serve?

Building 21 serves grades 9–12 as a high school.

How many students attend Building 21?

371 students attend Building 21, up from 350 the prior year, with a student-teacher ratio of 20.5:1.

Which school district is Building 21 in?

Building 21 is part of Philadelphia City School District, which reports 220 schools, 120,057 students and $17,593 of spending per student.