Black River School vs Calcium Primary School
A head-to-head comparison of two elementary schools in New York, United States, 4.9 km apart, using official American 2025 data. The better value in each row is highlighted.
Black River School
Black River · Public elementary · Grades PK–4
572 students
Calcium Primary School
Calcium · Public elementary · Grades PK–3
480 students
| Measure | Black River School Black River, New York | Calcium Primary School Calcium, New York |
|---|---|---|
| Success Index (US) | 51 Top 50% | 78 Top 25% |
| State rank | #1361 of 2,536 | #451 of 2,536 |
| National rank | #24508 of 50,301 | #6353 of 50,301 |
| Sector | Public | Public |
| Type | Elementary | Elementary |
| Year range | Grades PK–4 | Grades PK–3 |
| Students | 572 | 480 |
| Enrollment | 572 | 480 |
| Free/reduced-price lunch | 33.7% | 45.4% |
| Students per teacher | 11.4 | 11.2 |
| Reading proficiency | 42% | 67% |
| Math proficiency | 32% | 67% |
| city | Black River | Calcium |
| state | New York | New York |
| Website | – | – |
The verdict
- •Calcium Primary School scores higher on the Success Index (US) (77.6 vs 50.9).
- •Calcium Primary School does better on math proficiency (67% vs 32%).
- •Calcium Primary School does better on reading proficiency (67% vs 42%).
- •Black River School does better on community advantage (fewer free/reduced-price lunch) (33.7% vs 45.4%).
- •Calcium Primary School does better on students per teacher (11.2 vs 11.4).
- •Black River School is the larger school with 572 students compared with 480.
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 Black River School better than Calcium Primary School?
On the Success Index (US), Calcium Primary School ranks higher (77.6 vs 50.9 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 Black River School and Calcium Primary School?
About 4.9 km in a straight line, between Black River and Calcium in New York.
Which has the better Enrollment?
Black River School: 572. Calcium Primary School: 480. Students enrolled in the latest NCES directory year.
How do Black River School and Calcium Primary School rank in New York?
Black River School is 1361st of 2,536 and Calcium Primary School is 451st of 2,536 among elementary schools in New York on the 2025 Success Index (US).