Enrollment
642
Pennsylvania · 2024-25 NCES data
Elementary school (grades K-5) · Philadelphia, PA
Keystone Academy Cs
Federal NCES profile for Keystone Academy Cs, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 38/100.
2024-25 NCES dataElementary school (grades K-5)NCES 420076206103Charter school
👥 S:T ratio 34
🌟 Gifted program 30
🎓 Counselors 36
📋 Attendance 50
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Keystone Academy Cs earns 38/100 on the Resource Investment Index, with class sizes larger than 88% of Pennsylvania schools. It is also more racially and ethnically mixed than most Pennsylvania schools.
- #47 of 131
- elementary schools in Philadelphia · Resource Index
- 38
- Resource Index · Typical
- 16.5:1
- large classes for Pennsylvania
- 80.2%
- free-lunch eligible
Keystone Academy Cs has class sizes larger than 88% of Pennsylvania schools. Computed live against every Pennsylvania school reporting to NCES.
By Resource Investment Index, Keystone Academy Cs ranks #47 of 131 elementary schools in Philadelphia, PA.
School address
District: Keystone Academy Cs · Pennsylvania
NCES ID 420076206103 Verify on NCES CCD record →
Teachers (FTE)
39.0
Federal CCD staff survey
Students per teacher
16.5:1
vs 13.6:1 Pennsylvania avg
+21% vs state
Free-lunch eligible
80.2%
vs 58.1% Pennsylvania avg
+38% vs state
Student-teacher ratio in context
How Keystone Academy Cs compares with Pennsylvania and U.S. medians
What stands out at Keystone Academy Cs
Keystone Academy Cs is a high-poverty, mid-sized charter elementary school in Philadelphia, Pennsylvania, enrolling 642 students.
Class loads run heavy: 16.5:1 is larger than about 88% of Pennsylvania schools and 21% above the 13.6:1 state mean, so each teacher carries more students than is typical.
Economic need runs somewhat above the state's typical profile, with 80.2% of students eligible for free meals.
Enrollment of 642 puts it in the larger third of Pennsylvania schools by headcount.
Its Resource Investment Index lands in the lower third of 2,889 scored Pennsylvania schools.
Against 99 statewide peers matched on enrollment and economic need, it ranks mid-pack at #59.
Its student body is led by African American (36%) and Hispanic or Latino (34%), more mixed than most schools in the state (diversity index 71/100).
Counselor coverage runs a bit thin, about 321 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 19.9% of students chronically absent per the 2021-22 civil-rights collection.
Its district draws 17.6% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
The federal civil-rights collection also records 2 expulsions at this campus for 2021-22.
Among Philadelphia's elementary schools, it stands alongside Northeast Community Propel Academy (1,783 students): Keystone Academy Cs is smaller than that campus by headcount and runs leaner classes (16.5:1 vs 22.6:1).
Keystone Academy Cs is a single-school charter district, so Keystone Academy Cs 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 Keystone Academy Cs compares
Keystone Academy Cs on the metrics families compare, against Pennsylvania and U.S. means.
| Metric | This school | vs Pennsylvania | Pennsylvania avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.5:1 | ▲ 21% | 13.6:1 | 15.7:1 |
| Free-lunch eligible | 80.2% | ▲ 38% | 58.1% | 51.7% |
| Enrollment | 642 | top 25% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.5:1
Leaner classes than 34% of US schools, a middle-of-the-pack class size.
642
Bigger than 76% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
80.2%
free-lunch eligible
- 38% above the Pennsylvania average of 58.1%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
16.5:1
students per teacher
- 21% above state mean
Top 88% in Pennsylvania - lower ratio than 12% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
19.9%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$15,032
per pupil, district-wide
- below Pennsylvania avg of $17,970
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors2.0 FTE
Per 321 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 27 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 4.2 per 100 students. Reported via the Civil Rights Data Collection. Includes 2 expulsions.
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 36.3%
Hispanic or Latino 34.3%
White 17.1%
Asian 7.5%
Two or More 4.8%
Largest group: African American at 36.3% of enrollment.
Student-body diversity index 71.3/100
Simpson diversity index - at 71.3, Keystone Academy Cs is more mixed than the Pennsylvania school average of 37.3.
Programs
Funding & spending
District-wide per-pupil expenditure for Keystone Academy Cs, which includes Keystone Academy Cs.
$15,032
Per student
-16%
vs Pennsylvania
Avg $17,970
-9%
vs U.S.
Avg $16,593
Revenue mix
Local 81.2%
State 1.2%
Federal 17.6%
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 (~642 students)
Similar student-teacher ratio (~16.5:1)
Next steps
Verify locally before acting on Keystone Academy Cs's federal record.
- Compare Keystone Academy Cs against another school. Compare schools
- Keystone Academy Cs'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 Keystone Academy Cs
How many students attend Keystone Academy Cs?
Keystone Academy Cs has 642 students enrolled. It is an elementary school in Philadelphia, PA.
What is the student-teacher ratio at Keystone Academy Cs?
The student-teacher ratio at Keystone Academy Cs is 16.5:1, which is 21% higher than the Pennsylvania average of 13.6:1 and 5% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Keystone Academy Cs?
80.2% of students at Keystone Academy Cs are eligible for free lunch, compared to the Pennsylvania average of 58.1%.
What is the racial and ethnic makeup of Keystone Academy Cs?
The largest demographic group at Keystone Academy Cs is African American at 36.3% of enrollment, in Philadelphia, PA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 71.3/100.
What is the Resource Investment Index for Keystone Academy Cs?
Keystone Academy Cs has a Resource Investment Index of 38/100 (typical 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 Keystone Academy Cs rank among elementary schools in Philadelphia?
By Resource Investment Index, Keystone Academy Cs ranks #47 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 Keystone Academy Cs a good school?
Keystone Academy Cs earns 38/100 on the Resource Investment Index, with class sizes larger than 88% of Pennsylvania schools. It is also more 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 Keystone Academy Cs?
None; Keystone Academy Cs is a single-school charter district, and Keystone Academy Cs 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.