Keystone Academy CS vs Mastery CS-Francis D. Pastorius Elementary
A head-to-head comparison of two elementary schools in Pennsylvania, United States, 10 km apart, using official American 2025 data. The better value in each row is highlighted.
Keystone Academy CS
Philadelphia · Charter elementary · Grades K–8
642 students
Mastery CS-Francis D. Pastorius Elementary
Philadelphia · Charter elementary · Grades K–8
647 students
| Measure | Keystone Academy CS Philadelphia, Pennsylvania | Mastery CS-Francis D. Pastorius Elementary Philadelphia, Pennsylvania |
|---|---|---|
| Success Index (US) | 46 Lower 50% | 15 Lower 50% |
| State rank | #1067 of 1,627 | #1544 of 1,627 |
| National rank | #27968 of 50,301 | #47444 of 50,301 |
| Sector | Charter | Charter |
| Type | Elementary | Elementary |
| Year range | Grades K–8 | Grades K–8 |
| Students | 642 | 647 |
| Enrollment | 642 | 647 |
| Free/reduced-price lunch | 91% | 99.5% |
| Students per teacher | 15.3 | 15.0 |
| Reading proficiency | 69% | 31% |
| Math proficiency | 38% | 15% |
| city | Philadelphia | Philadelphia |
| state | Pennsylvania | Pennsylvania |
| Website | – | – |
The verdict
- •Keystone Academy CS scores higher on the Success Index (US) (45.9 vs 15.4).
- •Keystone Academy CS does better on math proficiency (38% vs 15%).
- •Keystone Academy CS does better on reading proficiency (69% vs 31%).
- •Keystone Academy CS does better on community advantage (fewer free/reduced-price lunch) (91% vs 99.5%).
- •Mastery CS-Francis D. Pastorius Elementary does better on students per teacher (15.0 vs 15.3).
- •Mastery CS-Francis D. Pastorius Elementary is the larger school with 647 students compared with 642.
The Success Index (US) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Keystone Academy CS better than Mastery CS-Francis D. Pastorius Elementary?
On the Success Index (US), Keystone Academy CS ranks higher (45.9 vs 15.4 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Keystone Academy CS and Mastery CS-Francis D. Pastorius Elementary?
About 10 km in a straight line, between Philadelphia and Philadelphia in Pennsylvania.
Which has the better Enrollment?
Keystone Academy CS: 642. Mastery CS-Francis D. Pastorius Elementary: 647. Students enrolled in the latest NCES directory year.
How do Keystone Academy CS and Mastery CS-Francis D. Pastorius Elementary rank in Pennsylvania?
Keystone Academy CS is 1067th of 1,627 and Mastery CS-Francis D. Pastorius Elementary is 1544th of 1,627 among elementary schools in Pennsylvania on the 2025 Success Index (US).