High · Pennsylvania

Building 21

Free meals for all

Building 21, a public high school in Philadelphia, Pennsylvania: grades 9–12, 371 students, 20.5 students per teacher (2024–25 school year). Part of Philadelphia City SD.

Size and class size

Compared with high schools of the same state and the whole country. Students per teacher counts every full-time-equivalent teacher, not the size of each class.

Students: 371
Teachers (FTE): 18.1
Students per teacher: 20.5
Grades: 9–12; High

More students per teacher than 96% of high schools in Pennsylvania

Median 13.3 · 712 schools compared

More students per teacher than 84% of high schools in the US

Median 14.4 · 20,809 schools compared

Smaller than 71% of high schools in Pennsylvania

Median 573 · 715 schools compared

Smaller than 53% of high schools in the US

Median 414 · 22,064 schools compared

State test results

No state test results published for this school: state tests cover grades 3–8, and small groups are not published.

What it offers

Grades: High · Grades 9–12
Type: District school · Regular
Instruction: Some virtual classes
Meals: Free breakfast and lunch for every student
Area: Large city
Run by: Philadelphia City SD

Which school a home is assigned to is decided by the district's attendance zones; check with Philadelphia City SD.

Location

Address: 6501 Limekiln Pike, Philadelphia, PA 19138
Phone: (215)400-7450
City or town: Philadelphia
County: Philadelphia County

Quality of life in Philadelphia Schools in Philadelphia

Nearby high schools

The closest public high schools by straight-line distance. Attendance zones are set by each district.

School	Grades	Students	Students / teacher
Imhotep Institute CHSCharter	9–12	603	22.3	0.3 mi
King Martin Luther HSFree meals for all	9–12	527	15.5	0.5 mi
Parkway NorthwestFree meals for all	9–12	238	20.3	0.7 mi
Girls HSFree meals for all	9–12	592	17.5	1.1 mi
Central HSFree meals for all	9–12	2,329	26.5	1.1 mi
Hill Freedman World AcademyFree meals for all	6–12	640	13.3	1.7 mi

Sources

Public schools and school districts (National Center for Education Statistics · U.S. Census Bureau), 2024–25 school year. NCES Common Core of Data and EDGE public school geocodes; U.S. Census Bureau, Annual Survey of School System Finances and cartographic boundary files (places).

Analisa does not rate schools. Figures are what a school has (students, teachers, programs), placed among schools of the same level; state test results are compared only within a state.

NCES 421899007534