Mastery CS John Wister Elementary

Located at 67 E Bringhurst Street in Philadelphia, Pennsylvania, Mastery CS John Wister Elementary is an active, independent charter school district operating a single campus within a vibrant, large-city setting. Tailored to foundational early childhood and intermediate education, the school serves 506 students from kindergarten through 5th grade. The student body maintains an even balance across gender lines—with 255 female and 251 male students enrolled—and reflects a rich urban community context. Class sizes remain steady across all levels, progressing from a strong early primary intake to a peak enrollment of 100 students in the graduating 5th-grade cohort.

To support academic growth and student well-being, the district maintains an exceptionally strong staffing structure totaling 115.7 full-time equivalent (FTE) positions. Instructional delivery is spearheaded by 60 full-time equivalent teachers, creating an advantageous student-to-teacher ratio of approximately 8.4 to 1 that allows for individualized attention. This instructional core is further reinforced by 10 FTE instructional aides and nearly 46 FTE support staff members dedicated to operational excellence and student services. Families and researchers seeking to learn more about the school’s programming and community leadership can explore their official portal at masterycharter.org.