Mastery CS John Wister Elementary
Score 10.6/100: better than 10% of Pennsylvania elementary schools on 2024-25 state tests. Schools are only compared with others of the same type in the same state. How we score schools
Performance (state tests, 2024-25)
% proficient or advanced on state tests in Pennsylvania, all students. Colored bars are green when the school is at or above the average for similar Pennsylvania schools.
Results over time
How this school's published results have moved year by year.
All 8 published results by grade and test
As published by Pennsylvania Department of Education. "Hidden" means the state didn't publish the result to protect student privacy.
| Subject | Grade | Test | Result | Students tested |
|---|---|---|---|---|
| English language arts | Grade 3 | PSSA | 44.3 | 70 |
| English language arts | Grade 4 | PSSA | 23.2 | 69 |
| English language arts | Grade 5 | PSSA | 13.1 | 84 |
| English language arts | All grades | PSSA | 26 | 223 |
| Math | Grade 3 | PSSA | 36.6 | 71 |
| Math | Grade 4 | PSSA | 28.2 | 71 |
| Math | Grade 5 | PSSA | 10.3 | 87 |
| Math | All grades | PSSA | 24 | 229 |
School profile
- Grades
- K-5
- Students
- 497
- Type
- Elementary school
- Charter school
- Yes
- Program
- Regular
Students
District and location
Contact
Philadelphia, PA 19144
"Typical" is the middle (median) elementary school in Pennsylvania. Higher or lower is not in itself better or worse. Address, phone and website are as the state reported them to the U.S. Department of Education for 2024-25, so check with the school before visiting. School details: U.S. Department of Education, Common Core of Data (enrollment 2023-24).
Nearby elementary schools
Straight-line distance. Check the district's attendance zones: living close to a school doesn't guarantee a place.
Explore schools around Philadelphia
Location
Official sources
Every figure on this page comes from published government data. Check the originals here; we refresh when states release new results.
U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD): school directory, grades served, enrollment and free/reduced-price lunch, 2023-24 and 2024-25. Spotted a mistake? Tell us.
Mastery CS John Wister Elementary at a glance
Mastery CS John Wister Elementary is a public elementary school (a charter school) in Philadelphia, Pennsylvania, serving grades K-5. It is part of the Mastery CS John Wister Elementary school district. It has about 497 students (a typical Pennsylvania elementary school has 422).
In 2024-25 state tests, 26% in English language arts (similar schools: 52%) and 24% in math (similar schools: 53%) reached the state standard (% proficient or advanced). On our score, which compares it only with other Pennsylvania elementary schools, it scores 10.6 out of 100: better than 10% of them, ranking #1,231 of 1,377. Its English language arts result was broadly unchanged from the year before. This overview is generated automatically from published state and federal data; figures are rounded, and you can check the originals via the official sources above.
Page updated 2026-10-12.