| Index | Plessis | New York | National |
| Average Test Scores | n/a | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Plessis | New York | National |
| Completed 8th grade | 88.9% | 83.5% | 84.3% |
| Completed high school | 88.9% | 82.1% | 83.0% |
| Completed some college | 75.9% | 59.5% | 59.4% |
| Completed associate degree | 75.9% | 43.4% | 38.5% |
| Completed bachelors | 13.0% | 34.7% | 30.3% |
| Completed masters | 0.0% | 15.1% | 11.5% |
| Completed professional degree | 0.0% | 4.2% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Plessis. Using the proficiency score averages, the average test scores for Plessis, NY schools is n/a. The average student to teacher ratio is n/a. In Plessis, NY, an average of 88.9% of students have completed 8th grade and an average of 88.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clayton, NY | 2,009 | 65% | 34.4% |
| Philadelphia, NY | 1,231 | 63% | 30.2% |
| Theresa, NY | 1,069 | 60% | 25.0% |
| Antwerp, NY | 714 | 60% | 25.0% |
| Evans Mills, NY | 460 | 60% | 24.0% |
| Plessis, NY | 378 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Salemburg, NC | 378 | 38% | 20.8% |
| Florence, SD | 378 | 46% | 5.2% |
| Neosho Rapids, KS | 378 | 40% | 16.7% |
| Calamus, IA | 378 | 70% | 44.8% |
| Barrett, MN | 379 | 63% | 30.7% |
| Plessis, NY | 378 | n/a |
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