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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
C
allk12 Grade
Scored higher than 32% of Pennsylvania public elementary schools
  • CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
  • C+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
  • ·Three-year trend Not available for this school, so the grade uses the other parts.

Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Pennsylvania public elementary schools

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, 2024-25

GradeStudentsShare
Kindergarten7612%
Grade 18113%
Grade 28012%
Grade 37612%
Grade 47512%
Grade 56210%
Grade 66510%
Grade 76210%
Grade 86510%

This year's kindergarten class (76) is 17% larger than its 8th grade class (65).

Student demographics
71%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
STATE 59% · US 70%
White
11017%
STATE 60% · US 43%
Hispanic
22034%
STATE 16% · US 30%
Black
23336%
STATE 14% · US 15%
Asian
487%
STATE 5% · US 6%
Two+
315%
STATE 5% · US 5%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). 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%

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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

What this means: On the PSSA + Keystone, Pennsylvania's statewide test, about 48 of every 100 students at this school read and write at grade level and about 28 of 100 do math at grade level. Across all Pennsylvania schools, those numbers are about 51 and 43. Reading and writing scores have held steady since 2023, while math scores are up about 3 points.

PSSA + Keystone results by year

School yearEnglish Language ArtsMath
2024-2547.7%27.9%
2023-2447.2%24.6%
% Proficient or Advanced, all students and all tested grades.
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

What this means: About 40% of students here test proficient in math and reading, compared with the roughly 39% typical for Pennsylvania schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Pennsylvania's top nor bottom 10%.

BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

Schools most like Keystone Academy CS

Keystone Academy CS's state test result (39.8% proficient) is higher than 4 of the 4 schools below with a result.

SchoolStudentsLow-incomeProficient
Keystone Academy CS this school64291.0%39.8%
Bywood Elementary School
Upper Darby
68395.3%19.2%
Clear Run El Center
Tobyhanna
65899.5%N/A
Lawton Henry W School
Philadelphia
57199.3%23.6%
Ziegler William H School
Philadelphia
52298.5%21.2%
Childs George W School
Philadelphia
47194.1%26.0%
Matched among Pennsylvania elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Keystone Academy CS ranks

Among elementary schools
MeasureThis schoolIn PennsylvaniaIn Philadelphia County
State test proficiency
ranked highest first
39.8%#1,067 of 1,396#33 of 161
Math proficiency
ranked highest first
27.9%#1,190 of 1,511
▲ 20
#53 of 193
▲ 1
Reading proficiency
ranked highest first
47.7%#805 of 1,511
▲ 179
#30 of 193
▲ 1
Enrollment
ranked largest first
642#191 of 1,638#46 of 194
Students per teacher
ranked fewest first
15.3:1#1,305 of 1,528#142 of 189
Diversity index
ranked most diverse first
71.4%#72 of 1,531#18 of 189
Free and reduced lunch
ranked highest share first
91.0%#651 of 1,600#168 of 193
Enrollment change since 2017-18
ranked steepest decline first
-6.6%#791 of 1,045#117 of 135
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
642
-5 (-1%) vs 2020
+69% since 2010-11, when it was 379
Student : Teacher
15.3:1
was 18.0:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-256424215.3:191% (584)
2023-246634315.4:188% (584)
2022-236663917.1:187% (580)
2020-216473618.0:185% (549)
2017-186873718.6:176% (521)
2015-165913417.4:168% (400)
2010-113792118.1:161% (230)
Source: NCES Common Core of Data. Rows are the federal collections on file for Keystone Academy CS.

Since 2017-18: students down 7% (687 to 642); teachers up 14% (37 to 42).

About Keystone Academy CS

Among the schools in Philadelphia, Pennsylvania, is Keystone Academy CS, a mid-sized elementary school. It reported 642 students in kindergarten through 8 in 2024-25. That compares with an average of about 443 students for elementary schools in Pennsylvania.

Keystone Academy CS is its own local education agency in federal data.

Of every 100 students at Keystone Academy CS, about 36 are Black, the largest group. After that, the student body is 34% Hispanic, 17% White, 7% Asian, and 5% multiracial. Census estimates put Philadelphia County at about 39% Black, close to the school's figure. A diversity index of 71% means there is a 71% chance two randomly chosen students at Keystone Academy CS are from different groups.

Teacher count: 42 full-time equivalents. Student-to-teacher ratio: 15.3:1. Compared with the 13.1:1 average for elementary schools in Pennsylvania, this school's ratio is higher. Eligibility for free or reduced-price lunch, often used to gauge student poverty, is 91%.

Among Pennsylvania public elementary schools, Keystone Academy CS outscored 32%, which works out to a C on the allk12 Grade.

After adjusting for student poverty, Keystone Academy CS lands between the top and bottom 10% of Pennsylvania schools. Its average proficiency rate across its state test results is 39.8%; the prediction is 38.6%.

The school's county is Philadelphia County. According to Census Bureau estimates, median household income comes to about $61,953, 35% of adults hold a bachelor's degree or higher, and about 17% of residents live below the federal poverty line. Philadelphia County's 309 public schools enroll about 182,005 students and include Keystone Academy CS.

Measured in a straight line, Disston Hamilton School is about 0.2 miles from Keystone Academy CS. The five-mile area around Keystone Academy CS holds at least 8 other public schools. Nearby schools with test data average 27.4% proficiency; Keystone Academy CS posts 39.8%.

Its location is classified as City: Large by the National Center for Education Statistics. Federal records list Keystone Academy CS as a charter school.

Compared with 2020-21, when it had 647 students, enrollment in 2024-25 was about the same at 642. In 2020-21, the student-to-teacher ratio was 18.0:1; by 2024-25 it was 15.3:1.

On allk12, people connected to Keystone Academy CS can post about special education services, counseling, and support programs. Members of the school community can share what they know.

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 and 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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