Elementary school (grades K-5) · Philadelphia, PA
Mastery Cs John Wister Elementary
Federal NCES profile for Mastery Cs John Wister Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 14/100.
The verdict
Mastery Cs John Wister Elementary earns 14/100 on the Resource Investment Index, with class sizes larger than 95% of Pennsylvania schools.
- #125 of 131
- elementary schools in Philadelphia · Resource Index
- 14
- Resource Index · Lower
- 18.1:1
- large classes for Pennsylvania
- 506
- students enrolled
Mastery Cs John Wister Elementary has class sizes larger than 95% of Pennsylvania schools. Computed live against every Pennsylvania school reporting to NCES.
By Resource Investment Index, Mastery Cs John Wister Elementary ranks #125 of 131 elementary schools in Philadelphia, PA.
School address
NCES ID 420088907599 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-16 students YoY
Mastery Cs John Wister Elementary held near 497 students from 2022-23 to 2023-24 (-16 headcount).
Teacher FTE added 28.0 → 31.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-16 students YoY 420088907599 · Philadelphia, PA Elementary · MID · CHARTER
506 enr · 18.1:1 · RII 14
Nearest enrollment peer: Twin Oaks Elementary (506 students)
Mastery Cs John Wister Elementary held near 497 students from 2022-23 to 2023-24 (-16 headcount). Teacher FTE added 28.0 → 31.0 across the same CCD years. Read with this school → · District book → · Pennsylvania schools → · Find another →
How Mastery Cs John Wister Elementary compares
Mastery Cs John Wister Elementary held steady on CCD headcount: ratios and free-lunch share vs Pennsylvania and U.S. means.
| Metric | This school | vs Pennsylvania | Pennsylvania avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.1:1 | ▲ 33% | 13.6:1 | 15.7:1 |
| Enrollment | 506 | top 43% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Equity indicators methodology
Student demographics
Largest group: African American at 89.3% of enrollment.
Simpson diversity index - at 19.8, Mastery Cs John Wister Elementary is less mixed than the Pennsylvania school average of 37.3.
Programs
District finance for Mastery Cs John Wister Elementary reports $16,801 per pupil (NCES F-33) - open the district page for the full revenue mix.
Similar elementary schools in Philadelphia
6 comparable elementary schools (grades K-5) serving the same city.
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~506 students)
Frequently asked questions about Mastery Cs John Wister Elementary
How many students attend Mastery Cs John Wister Elementary?
Mastery Cs John Wister Elementary has 506 students enrolled. It is an elementary school in Philadelphia, PA. CCD year-over-year: 513 (2022-23) → 497 (2023-24), nearly flat (-16).
What is the student-teacher ratio at Mastery Cs John Wister Elementary?
The student-teacher ratio at Mastery Cs John Wister Elementary is 18.1:1, which is 33% higher than the Pennsylvania average of 13.6:1 and 15% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Mastery Cs John Wister Elementary?
The largest demographic group at Mastery Cs John Wister Elementary is African American at 89.3% of enrollment, in Philadelphia, PA.
What is the Resource Investment Index for Mastery Cs John Wister Elementary?
Mastery Cs John Wister Elementary has a Resource Investment Index of 14/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mastery Cs John Wister Elementary rank among elementary schools in Philadelphia?
By Resource Investment Index, Mastery Cs John Wister Elementary ranks #125 of 131 elementary schools in Philadelphia, PA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Philadelphia on the city page.
What other schools are in Mastery Cs John Wister Elementary?
None; Mastery Cs John Wister Elementary is a single-school charter district, and Mastery Cs John Wister Elementary is its only campus.