Enrollment
419
Pennsylvania · 2024-25 NCES data
Elementary school (grades K-5) · Philadelphia, PA
Mastery Cs-Clymer Elementary
Federal NCES profile for Mastery Cs-Clymer Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 23/100.
2024-25 NCES dataElementary school (grades K-5)NCES 420084007400Charter school
👥 S:T ratio 46
🌟 Gifted program 30
🎓 Counselors 16
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mastery Cs-Clymer Elementary earns 23/100 on the Resource Investment Index, with class sizes near the Pennsylvania median.
- #103 of 131
- elementary schools in Philadelphia · Resource Index
- 23
- Resource Index · Lower
- 13.5:1
- students per teacher
- 419
- students enrolled
Mastery Cs-Clymer Elementary has class sizes near the Pennsylvania median. Computed live against every Pennsylvania school reporting to NCES.
By Resource Investment Index, Mastery Cs-Clymer Elementary ranks #103 of 131 elementary schools in Philadelphia, PA.
School address
District: Mastery Cs-Clymer Elementary · Pennsylvania
NCES ID 420084007400 Verify on NCES CCD record →
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
13.5:1
vs 13.6:1 Pennsylvania avg
-1% vs state
Student-teacher ratio in context
How Mastery Cs-Clymer Elementary compares with Pennsylvania and U.S. medians
What stands out at Mastery Cs-Clymer Elementary
Mastery Cs-Clymer Elementary is a mid-sized charter elementary school in Philadelphia, Pennsylvania, enrolling 419 students.
At 13.5:1, its student-teacher ratio sits close to the Pennsylvania median, within a few percentage points of the 13.6:1 state norm, neither notably crowded nor notably small.
With 419 students, its enrollment sits close to the Pennsylvania median campus size.
Its Resource Investment Index trails 97% of the 2,889 Pennsylvania schools with a score on record, one of the lower results on this measure.
Its student body is predominantly African American (81% of enrollment) (diversity index 33/100).
Counselor access is stretched at roughly 419 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 41.5% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 25.5% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Philadelphia's elementary schools, it stands alongside Northeast Community Propel Academy (1,783 students): Mastery Cs-Clymer Elementary is smaller than that campus by headcount and runs leaner classes (13.5:1 vs 22.6:1).
Mastery Cs-Clymer Elementary is a single-school charter district, so Mastery Cs-Clymer Elementary operates independently rather than alongside district-mates.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Mastery Cs-Clymer Elementary compares
Mastery Cs-Clymer Elementary on the metrics families compare, against Pennsylvania and U.S. means.
| Metric | This school | vs Pennsylvania | Pennsylvania avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.5:1 | ▼ 1% | 13.6:1 | 15.7:1 |
| Enrollment | 419 | top 57% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.5:1
Leaner classes than 62% of US schools, a middle-of-the-pack class size.
419
Bigger than 50% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
13.5:1
students per teacher
- 1% below state mean
Top 53% in Pennsylvania - lower ratio than 47% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
41.5%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$20,598
per pupil, district-wide
- above Pennsylvania avg of $17,970
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 419 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 4 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 1.0 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
African American 80.7%
Hispanic or Latino 13.6%
Two or More 3.3%
American Indian / Alaska Native 1.4%
White 1.0%
Largest group: African American at 80.7% of enrollment.
Student-body diversity index 32.9/100
Simpson diversity index - at 32.9, Mastery Cs-Clymer Elementary is less mixed than the Pennsylvania school average of 37.3.
Programs
Funding & spending
District-wide per-pupil expenditure for Mastery Cs-Clymer Elementary, which includes Mastery Cs-Clymer Elementary.
$20,598
Per student
+15%
vs Pennsylvania
Avg $17,970
+24%
vs U.S.
Avg $16,593
Revenue mix
Local 73.9%
State 0.6%
Federal 25.5%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
Similar elementary schools in Philadelphia
6 comparable elementary schools (grades K-5) serving the same city.
Northeast Community Propel Academy
Standard public school
1,783 students 22.6:1 students per teacher
Mayfair Sch
Standard public school
1,763 students 21:1 students per teacher
Solis-Cohen Solomon Sch
Standard public school
1,350 students 17.1:1 students per teacher
Mast Community Cs Iii
Standard public school
1,290 students 16.5:1 students per teacher
Moore J Hampton Sch
Standard public school
1,192 students 17:1 students per teacher
Farrell Louis H Sch
Standard public school
1,187 students 18:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Pennsylvania, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~419 students)
Similar student-teacher ratio (~13.5:1)
Next steps
Verify locally before acting on Mastery Cs-Clymer Elementary's federal record.
- Compare Mastery Cs-Clymer Elementary against another school. Compare schools
- Mastery Cs-Clymer Elementary's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Mastery Cs-Clymer Elementary
How many students attend Mastery Cs-Clymer Elementary?
Mastery Cs-Clymer Elementary has 419 students enrolled. It is an elementary school in Philadelphia, PA.
What is the student-teacher ratio at Mastery Cs-Clymer Elementary?
The student-teacher ratio at Mastery Cs-Clymer Elementary is 13.5:1, which is 1% lower than the Pennsylvania average of 13.6:1 and 14% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Mastery Cs-Clymer Elementary?
The largest demographic group at Mastery Cs-Clymer Elementary is African American at 80.7% of enrollment, in Philadelphia, PA.
What is the Resource Investment Index for Mastery Cs-Clymer Elementary?
Mastery Cs-Clymer Elementary has a Resource Investment Index of 23/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mastery Cs-Clymer Elementary rank among elementary schools in Philadelphia?
By Resource Investment Index, Mastery Cs-Clymer Elementary ranks #103 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.
Is Mastery Cs-Clymer Elementary a good school?
Mastery Cs-Clymer Elementary earns 23/100 on the Resource Investment Index, with class sizes near the Pennsylvania median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Mastery Cs-Clymer Elementary?
None; Mastery Cs-Clymer Elementary is a single-school charter district, and Mastery Cs-Clymer Elementary is its only campus.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.