Cos Cob School vs International School At Dundee
A head-to-head comparison of two elementary schools in Connecticut, United States, 2.2 km apart, using official American 2025 data. The better value in each row is highlighted.
Cos Cob School
Cos Cob · Public elementary · Grades PK–5
343 students
International School At Dundee
Riverside · Public elementary · Grades K–5
342 students
| Measure | Cos Cob School Cos Cob, Connecticut | International School At Dundee Riverside, Connecticut |
|---|---|---|
| Success Index (US) | 89 Top 5% | 94 Top 5% |
| State rank | #74 of 596 | #22 of 596 |
| National rank | #908 of 50,301 | #193 of 50,301 |
| Sector | Public | Public |
| Type | Elementary | Elementary |
| Year range | Grades PK–5 | Grades K–5 |
| Students | 343 | 342 |
| Enrollment | 343 | 342 |
| Free/reduced-price lunch | 16% | 10.5% |
| Students per teacher | 10.1 | 11.4 |
| Reading proficiency | 72% | 82% |
| Math proficiency | 74% | 82% |
| city | Cos Cob | Riverside |
| state | Connecticut | Connecticut |
| Website | – | – |
The verdict
- •International School At Dundee scores higher on the Success Index (US) (93.9 vs 89.4).
- •International School At Dundee does better on math proficiency (82% vs 74%).
- •International School At Dundee does better on reading proficiency (82% vs 72%).
- •International School At Dundee does better on community advantage (fewer free/reduced-price lunch) (10.5% vs 16%).
- •Cos Cob School does better on students per teacher (10.1 vs 11.4).
- •Cos Cob School is the larger school with 343 students compared with 342.
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 Cos Cob School better than International School At Dundee?
On the Success Index (US), International School At Dundee ranks higher (93.9 vs 89.4 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 Cos Cob School and International School At Dundee?
About 2.2 km in a straight line, between Cos Cob and Riverside in Connecticut.
Which has the better Enrollment?
Cos Cob School: 343. International School At Dundee: 342. Students enrolled in the latest NCES directory year.
How do Cos Cob School and International School At Dundee rank in Connecticut?
Cos Cob School is 74th of 596 and International School At Dundee is 22nd of 596 among elementary schools in Connecticut on the 2025 Success Index (US).