Clarke Pennsylvania Inc
Private · Grades Pre-K–5 · 25 students
Mastery CS John Wister Elementary
67 E Bringhurst Street, Philadelphia, PA 19144
Grades
K–5
Elementary
Students
506
Enrolled 2024–25
Students per teacher
16.9 : 1
Full-time teachers
District
Mastery CS John Wister Elementary
Philadelphia County
Schola Grade F · Far below average
Letter grade (A–F) · compared with 1,511 Pennsylvania elementary schools · How we grade
Percentiles compare this school with other Pennsylvania elementary schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Mastery CS John Wister Elementary
Mastery CS John Wister Elementary is a charter elementary school in Philadelphia, Pennsylvania, serving grades K–5. The school is located in a large city in Philadelphia County.
In the 2024–25 school year, 506 students were enrolled, with about 16.9 students for every full-time teacher. That ratio is larger than the typical Pennsylvania elementary school (12.8 students per teacher). As a charter school, it is publicly funded and tuition-free, but operates independently of the local district under a charter from Philadelphia City SD. Its Schola Grade is F (far below average), compared with 1,511 Pennsylvania elementary schools.
Grades & enrollment
Students per grade, 2024–25Grades K–5
Location & nearby schools
School details
- Type
- Charter School · What this means
- Level
- Elementary
- Grades offered
- K–5
- Enrollment (2024–25)
- 506 students
- Students per teacher
- 16.9 to 1
- Charter school
- Yes
- Charter authorizer
- Philadelphia City SD
- Magnet school
- No
- Virtual learning
- Offers virtual courses
- Locale
- City — Large
- School district
- Mastery CS John Wister Elementary
- County
- Philadelphia County
- NCES school ID
- 420088907599
Schools near Mastery CS John Wister Elementary
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Logan James Sch
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School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.