Building 21

Public 9-12

 6501 Limekiln Pike
       Philadelphia, PA  19138


(215) 400-7450

District: Philadelphia City School District

SchoolDigger Rank:
668th of 674 Pennsylvania High Schools

Per Pupil Expenditures:  $19,436 Help


Student/teacher ratio:  19.2 Help
Number of students:  388

Racial breakdown:

African American:
87.6%
Hispanic:
8.0%
Two or more races:
2.8%
more

Free/discounted lunch recipients:  100% Help


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 Compare Building 21 to nearby high schools!

Performance Trends
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Compare Details Building 21 ranks worse than 99.1% of high schools in Pennsylvania. It also ranks 52nd among 54 ranked high schools in the Philadelphia City School District. (See more...)
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Compare Details In 2023 the calculated Average Standard Score was 2.98. (See more...)
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The Adjusted Cohort Graduation Rate (ACGR) measures the percentage of Building 21 freshmen who graduate within four years, adjusting for students who transfer in or out.
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The high school dropout rate measures the percentage of students who do not complete their high school education.
Student Body
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Compare Details Racial makeup is: African American (87.6%), Hispanic (8%), two or more races (2.8%). (See more...)
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Compare Details 100% of students are receiving a free or discounted lunch. (See more...)
Teachers
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Compare Details The student/teacher ratio at Building 21 is 19.2. 46 high schools in the Philadelphia City School District have better student/teacher ratios. (See more...)
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Compare Building 21 employs 20.2 full-time teachers.
Finance
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Compare Details The average total spent per student at Building 21 is $19,436, which is the 19th highest among 54 high schools in the Philadelphia City School District.
Schooldigger 2023 Rankings:

Building 21:

SchoolDigger ranks Building 21 668th of 674 Pennsylvania public high schools. (See Building 21 in the ranking list.)

High School Test Score Ratings by Student Subgroup:


Low Socio Economic Status students:
Disabled students:
African American students:


Philadelphia City School District:

SchoolDigger ranks Philadelphia City School District 494th of 606 Pennsylvania school districts. (See district ranking list.)


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Rank History for Building 21

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Compare

Rank History for all students at Building 21

Year Avg Standard Score Statewide Rank Total # Ranked High Schools PA State Percentile SchoolDigger Rating
2019 2.38 655th 693 5.5%
2022 4.61 600th 634 5.4%
2023 2.98 668th 674 0.9%
See the entire list of Pennsylvania High School Rankings!

Rank History for Low Socio Economic Status students at Building 21

Year Avg Standard Score Statewide Rank Total # Ranked High Schools PA State Percentile SchoolDigger Rating
2023 4.32 643rd 652 1.4%
See the entire list of Best Pennsylvania High Schools for Low Socio Economic Status Students!

Rank History for Disabled students at Building 21

Year Avg Standard Score Statewide Rank Total # Ranked High Schools PA State Percentile SchoolDigger Rating
2023 12.74 498th 502 0.8%
See the entire list of Best Pennsylvania High Schools for Disabled Students!

Rank History for African American students at Building 21

Year Avg Standard Score Statewide Rank Total # Ranked High Schools PA State Percentile SchoolDigger Rating
2023 11.58 247th 260 5.0%
See the entire list of Best Pennsylvania High Schools for African American Students!

Data source: test scores: Pennsylvania Department of Education, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Building 21 Test Scores
Tests: 
  
Grades: 
  
Years: 
  
Group by: 
District Scores:
State Scores:    
  
Subgroup: 



Data source: Pennsylvania Department of Education

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Enrollment information for Building 21

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Compare
Year White African American Asian Hispanic American Indian Pacific Islander Two or More Races Not Specified Total
2015 5 91 0 36 0 0 5 0 137
2016 10 182 2 89 1 0 5 0 289
2017 5 225 2 109 1 0 9 0 351
2018 4 267 2 75 1 0 8 0 357
2019 3 276 1 46 0 0 8 0 334
2020 4 307 0 27 0 0 12 0 350
2021 4 352 2 29 0 0 10 0 397
2022 3 357 3 26 0 0 10 0 399
2023 2 340 4 31 0 0 11 0 388

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Building 21

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2015 137 10.0 13.7 78.8
2016 289 8.0 36.1 100
2017 351 20.5 17.1 98
2018 357 12.8 27.8 99.4
2019 334 19.0 17.5 100
2020 350 19.0 18.3 100
2021 397 20.2 19.6 99.2
2022 399 18.9 21.0 99.2
2023 388 20.2 19.2 100

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio Building 21

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2015 137 10.0 13.7 78.8
2016 289 8.0 36.1 100
2017 351 20.5 17.1 98
2018 357 12.8 27.8 99.4
2019 334 19.0 17.5 100
2020 350 19.0 18.3 100
2021 397 20.2 19.6 99.2
2022 399 18.9 21.0 99.2
2023 388 20.2 19.2 100

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.
Finances

Per Pupil Expenditures for Building 21

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YearExpenditures from Federal FundsExpenditures from State and Local FundsTotal Expenditures Per Pupil (All Funds)
2019 $1,495 (10.5%) $12,746 (89.5%) $14,242
2020 $2,580 (16.9%) $12,670 (83.1%) $15,251
2021 $3,596 (23.7%) $11,549 (76.3%) $15,146
2022 $10,686 (55.0%) $8,750 (45.0%) $19,436

Data source: Pennsylvania Department of Education
Pre and Post Pandemic Data

Impact of COVID-19 on Building 21

The coronavirus has had a profound impact on education in America. Learning shifted online overnight, attendance numbers dwindled, and enrollment decreased. SchoolDigger.com is making it easier for you to better assess how COVID-19 has impacted your school. Through the collection of pre-pandemic (2019) and current data, SchoolDigger.com is sharing test scores, enrollment numbers and school demographics from schools across the country – and we make it easy to see how impacted schools compare locally and statewide.

Rankings

Rank
Pre-pandemic (2018-2019)
Rank
Post pandemic (2022-2023)
Change (%)
Ranks 655th of 693 High schoolsRanks 668th of 674 High schools
 4.6%

Test Scores

% proficient
Pre-pandemic (2018-2019)
% proficient
Post pandemic (2022-2023)
Change (%)
11th Grade Algebra I (Building 21)6.60
 6.6%
   11th Grade Algebra I (Pennsylvania)63.334.1
 29.2%
11th Grade Biology (Building 21)00
   11th Grade Biology (Pennsylvania)63.250.7
 12.5%
11th Grade Literature (Building 21)33.319.7
 13.6%
   11th Grade Literature (Pennsylvania)71.565.3
 6.2%

Student Body

Number of students
Pre-pandemic (2018-2019)
Number of students
Post pandemic (2022-2023)
Change (%)
Total Students334388
 16.2%
African American276340
 23.2%
American Indian00
Asian14
 300%
Hispanic4631
 32.6%
Pacific Islander00
White32
 33.3%
Two or More Races811
 37.5%
% Free/Discounted Lunch Recipients100%100%


Schools Near Building 21









Frequently Asked Questions about Building 21

Students at Building 21 are 88% African American, 8% Hispanic, 3% Two or more races, 1% Asian.

In the 2022-23 school year, 388 students attended Building 21.

Building 21 ranks in the bottom 0.9% of Pennsylvania high schools.


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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Pennsylvania Department of Education. Attendance Areas provided by ATTOM.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.





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