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SCHOOL COMMUNITY·KEYSTONE ACADEMY CS·NCES 420076206103

Keystone Academy CS

4521 Longshore Avenue, Philadelphia, PA 19135 · (215) 332-2111 · Philadelphia County
GRADES KG–08ELEMENTARY11-CITYCHARTERTITLE IREGULAR SCHOOL642 STUDENTS
Enrollment
642
Elementary
STATE 443
Student : Teacher
15.3:1
42 FTE teachers
STATE 13.1:1
Free / Reduced Lunch
91%
584 students
STATE 75%
Community
1
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Kindergarten
76
Grade 1
81
Grade 2
80
Grade 3
76
Grade 4
75
Grade 5
62
Grade 6
65
Grade 7
62
Grade 8
65
Student demographics
White
11017%
STATE 60%
Hispanic
22034%
STATE 16%
Black
23336%
STATE 14%
Asian
487%
STATE 5%
Two+
315%
STATE 5%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
32050%
Female
32250%

Discussions

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Test scores

PSSA + Keystone 2024-25 . % Proficient or Advanced
English Language Arts
47.7%
PA avg 51.1% . +0.5pp since 2023
Math
27.9%
PA avg 43.0% . +3.3pp since 2023
Source: PSSA + Keystone. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
39.8%
composite math + reading, all grades
Predicted
38.6%
based on PA schools with similar FRL share
Beats by
+1.1pp
above demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
642
-45 (-7%) vs 2017
Student : Teacher
15.3:1
was 18.6:1
% White
17%
was 27%
% Hispanic
34%
was 27%
% Black
36%
was 32%
% Asian
7%
was 7%
Source: NCES Common Core of Data

About Keystone Academy CS

As a moderately sized elementary-level community in Philadelphia, Pennsylvania, Keystone Academy CS instructs 642 students from grades K through 8, one of the schools within Keystone Academy CS. Enrollment runs roughly 45% larger than the state mean of about 443.

Keystone Academy CS is a school of Keystone Academy CS, the district that handles curriculum, staffing, and budget for the campus.

For racial and ethnic makeup, Keystone Academy CS records that the most-represented group is Black (36%), with the rest of the student body spread across multiple groups. The remainder is composed of 34% Hispanic, 17% White, 7% Asian, 5% multiracial. Compared to Philadelphia County overall, the school's racial mix sits in roughly the same range.

Looking at school resources, On paper, Keystone Academy CS has 42 full-time-equivalent teachers, translating to a class-load average of around 15.3:1. Statewide, the average ratio sits near 13.1:1, putting Keystone Academy CS higher than the state norm the norm. About 91% of enrolled students meet the income threshold for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal.

After controlling for student poverty, Keystone Academy CS tracks the demographic baseline. The model predicts 38.6% given the school's FRL share; actual proficiency is 39.8%.

In the surrounding community, Philadelphia County reports that median household income runs about $61,953, 35% of adults hold a bachelor's degree or higher, and the poverty rate sits near 17%. In all, Philadelphia County runs 309 public schools (combined enrollment of about 182,005 students), of which Keystone Academy CS is one.

Nearest neighbor: Disston Hamilton Sch, around 0.2 miles off. Within five miles, there are 8 other public schools. Among the 9 schools in that immediate cluster with test data (this one included), Keystone Academy CS ranks 2nd on composite proficiency, higher than the local average of 27.4%.

Geographically, the school is in a city-core area. Keystone Academy CS operates as a public charter school, meaning it is publicly funded but governed independently of the surrounding district's traditional schools.

Trend over the last 7 years. Over the past 7-year window, the student count fell 7%: 687 students in 2018 compared to 642 in 2025. Over the same period, the White share fell from 27% to 17%. The student-to-teacher ratio fell from 18.6:1 in 2018 to 15.3:1 today.

Inside the community feed, posts here usually surface around enrollment questions, classroom assignments, and PTA news. Parents, students, alumni, and staff are welcome to weigh in.

Philadelphia County at a glance

View full county profile
Population
1,579,706
Census ACS
Median income
$61,953
Household, ACS
Bachelor's+
35%
Adults 25+
Poverty rate
17%
Below federal line
Schools in county
309
182,005 students

Quick facts

School name
Keystone Academy CS
District
Keystone Academy CS
Address
4521 Longshore Avenue, Philadelphia, PA 19135
Phone
(215) 332-2111
County
Philadelphia County
Level
Elementary
Grade range
KG–08
Total enrollment
642
Teachers (FTE)
42
Student–teacher ratio
15.3:1
Free/Reduced lunch
584 (91%)
Locale
11-City: Large
NCES ID
420076206103
Charter school
Yes
Virtual school
No

Related schools

Other schools in Philadelphia
Nearby schools

Frequently asked questions

About Keystone Academy CS
How large is Keystone Academy CS?
Keystone Academy CS enrolls approximately 642 students in grades KG-08.
What age range does Keystone Academy CS serve?
Keystone Academy CS serves students from grade KG through grade 08.
How many teachers does Keystone Academy CS have?
Keystone Academy CS employs 42 FTE teachers, for a student-to-teacher ratio of 15.3:1.
How diverse is Keystone Academy CS?
Keystone Academy CS reports a student body of 17% White, 34% Hispanic, 36% Black, 7% Asian, 5% Two or more.
Is Keystone Academy CS public or private?
Keystone Academy CS is a public K-12 school operated as a charter, overseen by Keystone Academy CS.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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