| Index | Hartwell | Missouri | National |
| Average Test Scores | n/a | 44% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |

| Index | Hartwell | Missouri | National |
| Completed 8th grade | 0.0% | 86.0% | 84.3% |
| Completed high school | 0.0% | 84.2% | 83.0% |
| Completed some college | 0.0% | 57.7% | 59.4% |
| Completed associate degree | 0.0% | 35.2% | 38.5% |
| Completed bachelors | 0.0% | 27.6% | 30.3% |
| Completed masters | 0.0% | 10.4% | 11.5% |
| Completed professional degree | 0.0% | 2.8% | 3.3% |
| Completed doctorate | n/a | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Hartwell. Using the proficiency score averages, the average test scores for Hartwell, MO schools is n/a. The average student to teacher ratio is n/a. In Hartwell, MO, an average of 0.0% of students have completed 8th grade and an average of 0.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Leeton, MO | 629 | 56% | 16.0% |
| Montrose, MO | 481 | 45% | 6.3% |
| Creighton, MO | 327 | 45% | 7.3% |
| Clinton, MO | 9,037 | 43% | 10.8% |
| Deepwater, MO | 467 | 36% | 25.5% |
| Hartwell, MO | 103 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Dupuyer, MT | 103 | 50% | 4.2% |
| Bickleton, WA | 103 | 65% | 34.4% |
| Rosalia, KS | 102 | 32% | 32.6% |
| Melstone, MT | 104 | 47% | 2.8% |
| Worton, MD | 102 | 52% | 8.3% |
| Hartwell, MO | 103 | n/a |