Serving 506 students in grades Kindergarten-5, Mastery Cs John Wister Elementary School ranks in the bottom 50% of all schools in Pennsylvania for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 13% (which is lower than the Pennsylvania state average of 38%). The percentage of students achieving proficiency in reading/language arts is 12% (which is lower than the Pennsylvania state average of 55%).
The student-teacher ratio of 17:1 is higher than the Pennsylvania state level of 13:1.
Minority enrollment is 99% of the student body (majority Black), which is higher than the Pennsylvania state average of 40% (majority Hispanic and Black).
Quick Facts (2026)
- School Type: Charter School
- Grades: Kindergarten-5
- Enrollment: 506 students
- Student-Teacher Ratio: 17:1
- Minority Enrollment: 99%
- Overall Testing Rank: Bottom 50% in PA
- Math Proficiency: 13% (Btm 50%)
- Reading Proficiency: 12% (Btm 50%)
- Science Proficiency: 30-34% (Btm 50%)
- Source: National Center for Education Statistics (NCES), PA Dept. of Education
School Overview
Mastery Cs John Wister Elementary School's student population of 506 students has stayed relatively flat over five school years.
The teacher population of 30 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades Kindergarten-5
(No virtual instruction)
(No virtual instruction)
Total Students
506 students
Total Classroom Teachers
30 teachers
School Rankings
Mastery Cs John Wister Elementary School ranks within the bottom 50% of all 2,733 schools in Pennsylvania (based off of combined math and reading proficiency testing data).
The diversity score of Mastery Cs John Wister Elementary School is 0.20, which is less than the diversity score at state average of 0.60. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2550 out of 2733 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
13%
38%
Reading/Language Arts Test Scores (% Proficient)
12%
55%
Science Test Scores (% Proficient)
30-34%
57%
Student-Teacher Ratio
17:1
13:1
American Indian
n/a
n/a
Asian
n/a
5%
Hispanic
6%
16%
Black
89%
14%
White
1%
60%
Hawaiian
n/a
n/a
Two or more races
4%
5%
All Ethnic Groups
Eligible for Free Lunch
98%
59%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), PA Dept. of Education
Frequently Asked Questions
What is Mastery Cs John Wister Elementary School's ranking?
Mastery Cs John Wister Elementary School is ranked #2550 out of 2,733 schools, which ranks it among the bottom 50% of public schools in Pennsylvania.
What percent of students have achieved state testing proficiency in math and reading?
13% of students have achieved math proficiency (compared to the 38% PA state average), while 12% of students have achieved reading proficiency (compared to the 55% PA state average).
How many students attend Mastery Cs John Wister Elementary School?
506 students attend Mastery Cs John Wister Elementary School.
What is the racial composition of the student body?
89% of Mastery Cs John Wister Elementary School students are Black, 6% of students are Hispanic, 4% of students are Two or more races, and 1% of students are White.
What is the student-teacher ratio of Mastery Cs John Wister Elementary School?
Mastery Cs John Wister Elementary School has a student ration of 17:1, which is higher than the Pennsylvania state average of 13:1.
What grades does Mastery Cs John Wister Elementary School offer ?
Mastery Cs John Wister Elementary School offers enrollment in grades Kindergarten-5 (No virtual instruction).
What school district is Mastery Cs John Wister Elementary School part of?
Mastery Cs John Wister Elementary School is part of Mastery CS John Wister Elementary School District.
In what neighborhood is Mastery Cs John Wister Elementary School located?
Mastery Cs John Wister Elementary School is located in the East Germantown neighborhood of Philadelphia, PA. There are 4 other public schools located in East Germantown.
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