Enrollment
1,253
Pennsylvania · 2024-25 NCES data
Other / mixed grade configuration · Philadelphia, PA
Mastery Cs-Hardy Williams
Federal NCES profile for Mastery Cs-Hardy Williams, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 25/100.
2024-25 NCES dataOther / mixed grade configurationNCES 420006200504Charter school
👥 S:T ratio 27
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 44
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mastery Cs-Hardy Williams earns 25/100 on the Resource Investment Index, with class sizes larger than 95% of Pennsylvania schools. It is also less racially and ethnically mixed than most Pennsylvania schools.
- #90 of 106
- schools in Philadelphia · Resource Index
- 25
- Resource Index · Lower
- 18.2:1
- large classes for Pennsylvania
- 1,253
- students enrolled
Mastery Cs-Hardy Williams has class sizes larger than 95% of Pennsylvania schools. Computed live against every Pennsylvania school reporting to NCES.
By Resource Investment Index, Mastery Cs-Hardy Williams ranks #90 of 106 schools in Philadelphia, PA.
School address
District: Mastery Cs-Hardy Williams · Pennsylvania
NCES ID 420006200504 Verify on NCES CCD record →
Teachers (FTE)
69.0
Federal CCD staff survey
Students per teacher
18.2:1
vs 13.6:1 Pennsylvania avg
+34% vs state
Student-teacher ratio in context
How Mastery Cs-Hardy Williams compares with Pennsylvania and U.S. medians
What stands out at Mastery Cs-Hardy Williams
Mastery Cs-Hardy Williams is a large charter combined-grade school in Philadelphia, Pennsylvania, enrolling 1,253 students.
Class loads run heavy: 18.2:1 is larger than about 95% of Pennsylvania schools and 34% above the 13.6:1 state mean, so each teacher carries more students than is typical.
By headcount it is one of the larger campuses in Pennsylvania, bigger than 94% of state schools at 1,253 students.
Its Resource Investment Index trails 96% 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 (95% of enrollment), among the less diverse in the state (diversity index 10/100).
Counselor access is stretched at roughly 1253 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 22.3% of students chronically absent per the 2021-22 civil-rights collection.
Its district draws 20.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Philadelphia's public schools, it stands alongside Philadelphia Performing Arts Cs (2,572 students): Mastery Cs-Hardy Williams is smaller than that campus by headcount and runs heavier classes (18.2:1 vs 15.5:1).
Mastery Cs-Hardy Williams is a single-school charter district, so Mastery Cs-Hardy Williams 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-Hardy Williams compares
Mastery Cs-Hardy Williams on the metrics families compare, against Pennsylvania and U.S. means.
| Metric | This school | vs Pennsylvania | Pennsylvania avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.2:1 | ▲ 34% | 13.6:1 | 15.7:1 |
| Enrollment | 1,253 | top 6% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
18.2:1
Leaner classes than 23% of US schools, heavier class loads than most.
1,253
Bigger than 94% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
18.2:1
students per teacher
- 34% above state mean
Top 95% in Pennsylvania - lower ratio than 5% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
22.3%
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
$18,102
per pupil, district-wide
- above Pennsylvania avg of $17,970
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 1253 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 104 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 8.3 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 94.7%
Hispanic or Latino 2.8%
Two or More 1.6%
American Indian / Alaska Native 0.4%
White 0.2%
Asian 0.2%
Native Hawaiian / Pacific Islander 0.2%
Largest group: African American at 94.7% of enrollment.
Student-body diversity index 10.2/100
Simpson diversity index - at 10.2, Mastery Cs-Hardy Williams is less mixed than the Pennsylvania school average of 37.3.
Programs
AP courses offered 4
Funding & spending
District-wide per-pupil expenditure for Mastery Cs-Hardy Williams, which includes Mastery Cs-Hardy Williams.
$18,102
Per student
+1%
vs Pennsylvania
Avg $17,970
+9%
vs U.S.
Avg $16,593
Revenue mix
Local 78.7%
State 1.2%
Federal 20.2%
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 other schools in Philadelphia
6 comparable other schools (grades Mixed) serving the same city.
Philadelphia Performing Arts Cs
Standard public school
2,572 students 15.5:1 students per teacher
Mast Community Cs Ii
Standard public school
1,875 students 16:1 students per teacher
First Philadelphia Preparatory Cs
Standard public school
1,831 students 18.9:1 students per teacher
Esperanza Academy Cs
Standard public school
1,637 students 14.1:1 students per teacher
Frank Anne Sch
Standard public school
1,622 students 21.6:1 students per teacher
New Foundations Cs
Standard public school
1,529 students 15.6:1 students per teacher
Similar other 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 (~1,253 students)
Similar student-teacher ratio (~18.2:1)
Next steps
Verify locally before acting on Mastery Cs-Hardy Williams's federal record.
- Compare Mastery Cs-Hardy Williams against another school. Compare schools
- Mastery Cs-Hardy Williams'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-Hardy Williams
How many students attend Mastery Cs-Hardy Williams?
Mastery Cs-Hardy Williams has 1,253 students enrolled. It is a public school in Philadelphia, PA.
What is the student-teacher ratio at Mastery Cs-Hardy Williams?
The student-teacher ratio at Mastery Cs-Hardy Williams is 18.2:1, which is 34% higher than the Pennsylvania average of 13.6:1 and 16% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Mastery Cs-Hardy Williams?
The largest demographic group at Mastery Cs-Hardy Williams is African American at 94.7% of enrollment, in Philadelphia, PA.
What is the Resource Investment Index for Mastery Cs-Hardy Williams?
Mastery Cs-Hardy Williams has a Resource Investment Index of 25/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mastery Cs-Hardy Williams rank among schools in Philadelphia?
By Resource Investment Index, Mastery Cs-Hardy Williams ranks #90 of 106 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 schools in Philadelphia on the city page.
Is Mastery Cs-Hardy Williams a good school?
Mastery Cs-Hardy Williams earns 25/100 on the Resource Investment Index, with class sizes larger than 95% of Pennsylvania schools. It is also less racially and ethnically mixed than most Pennsylvania schools. 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-Hardy Williams?
None; Mastery Cs-Hardy Williams is a single-school charter district, and Mastery Cs-Hardy Williams 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.