Serving 411 students in grades 9-12, Building 21 Allentown ranks in the bottom 50% of all schools in Pennsylvania for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is ≤10% (which is lower than the Pennsylvania state average of 38%). The percentage of students achieving proficiency in reading/language arts is 35-39% (which is lower than the Pennsylvania state average of 55%).
The student-teacher ratio of 16:1 is higher than the Pennsylvania state level of 13:1.
Minority enrollment is 95% of the student body (majority Hispanic), which is higher than the Pennsylvania state average of 39% (majority Hispanic).
Quick Facts (2025-26)
- School Type: Magnet School
- Grades: 9-12
- Enrollment: 411 students
- Student-Teacher Ratio: 16:1
- Minority Enrollment: 95%
- Graduation Rate: 80-84% (Btm 50% in PA)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: ≤10% (Btm 50%)
- Reading Proficiency: 35-39% (Btm 50%)
- Source: National Center for Education Statistics (NCES), PA Dept. of Education
School Overview
Building 21 Allentown's student population of 411 students has declined by 14% over five school years.
The teacher population of 26 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
411 students
Gender %
Total Classroom Teachers
26 teachers
School Rankings
Building 21 Allentown ranks within the bottom 50% of all 2,733 schools in Pennsylvania (based off of combined math and reading proficiency testing data).
The diversity score of Building 21 Allentown is 0.36, which is less than the diversity score at state average of 0.59. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2345 out of 2733 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
≤10%
38%
Reading/Language Arts Test Scores (% Proficient)
35-39%
55%
Student-Teacher Ratio
16:1
13:1
American Indian
n/a
n/a
Asian
1%
5%
Hispanic
79%
15%
Black
11%
14%
White
5%
61%
Hawaiian
n/a
n/a
Two or more races
4%
5%
All Ethnic Groups
Graduation Rate
80-84%
87%
Eligible for Free Lunch
100%
60%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), PA Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Building 21 Allentown's ranking?
Building 21 Allentown is ranked #2345 out of 2,733 schools, which ranks it among the bottom 50% of public schools in Pennsylvania.
What percent of students have achieved state testing proficiency in math and reading?
≤10% of students have achieved math proficiency (compared to the 38% PA state average), while 35-39% of students have achieved reading proficiency (compared to the 55% PA state average).
What is the graduation rate of Building 21 Allentown?
The graduation rate of Building 21 Allentown is 80-84%, which is lower than the Pennsylvania state average of 87%.
How many students attend Building 21 Allentown?
411 students attend Building 21 Allentown.
What is the racial composition of the student body?
79% of Building 21 Allentown students are Hispanic, 11% of students are Black, 5% of students are White, 4% of students are Two or more races, and 1% of students are Asian.
What is the student-teacher ratio of Building 21 Allentown?
Building 21 Allentown has a student ration of 16:1, which is higher than the Pennsylvania state average of 13:1.
What grades does Building 21 Allentown offer ?
Building 21 Allentown offers enrollment in grades 9-12 (No virtual instruction).
What school district is Building 21 Allentown part of?
Building 21 Allentown is part of Allentown City School District.
School Reviews
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