Building 21 vs King Martin Luther HS
A head-to-head comparison of two high schools in Pennsylvania, United States, 822 m apart, using official American 2025 data. The better value in each row is highlighted.
Building 21
Philadelphia · Public high · Grades 9–12
371 students
King Martin Luther HS
Philadelphia · Public high · Grades 9–12
527 students
| Measure | Building 21 Philadelphia, Pennsylvania | King Martin Luther HS Philadelphia, Pennsylvania |
|---|---|---|
| Success Index (US) | 9 Lower 50% | 9 Lower 50% |
| State rank | #611 of 618 | #612 of 618 |
| National rank | #16656 of 16,910 | #16660 of 16,910 |
| Sector | Public | Public |
| Type | High | High |
| Year range | Grades 9–12 | Grades 9–12 |
| Students | 371 | 527 |
| Enrollment | 371 | 527 |
| Free/reduced-price lunch | 103% | 100% |
| Students per teacher | 20.6 | 15.5 |
| Reading proficiency | 32% | 17% |
| Math proficiency | 7.5% | 2.5% |
| city | Philadelphia | Philadelphia |
| state | Pennsylvania | Pennsylvania |
| Website | – | – |
The verdict
- •Both schools have almost identical Success Index (US) scores (9.2 vs 9.2).
- •Building 21 does better on math proficiency (7.5% vs 2.5%).
- •Building 21 does better on reading proficiency (32% vs 17%).
- •King Martin Luther HS does better on community advantage (fewer free/reduced-price lunch) (100% vs 103%).
- •King Martin Luther HS does better on students per teacher (15.5 vs 20.6).
- •King Martin Luther HS is the larger school with 527 students compared with 371.
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 Building 21 better than King Martin Luther HS?
The two schools are very close on the Success Index (US). Differences in sector, size, programmes and distance from home will matter more than the score.
How far apart are Building 21 and King Martin Luther HS?
About 822 m in a straight line, between Philadelphia and Philadelphia in Pennsylvania.
Which has the better Enrollment?
Building 21: 371. King Martin Luther HS: 527. Students enrolled in the latest NCES directory year.
How do Building 21 and King Martin Luther HS rank in Pennsylvania?
Building 21 is 611th of 618 and King Martin Luther HS is 612th of 618 among high schools in Pennsylvania on the 2025 Success Index (US).