| Index | Shackle Island | Tennessee | National |
| Average Test Scores | n/a | 35% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 1,390 | 79,221 |
| Total private schools | n/a | 430 | 24,874 |
| Total post-secondary schools | n/a | 189 | 7,963 |
| Index | Shackle Island | Tennessee | National |
| Completed 8th grade | 95.1% | 82.0% | 84.3% |
| Completed high school | 95.1% | 79.9% | 83.0% |
| Completed some college | 74.8% | 53.2% | 59.4% |
| Completed associate degree | 46.5% | 32.2% | 38.5% |
| Completed bachelors | 40.1% | 25.4% | 30.3% |
| Completed masters | 15.5% | 9.3% | 11.5% |
| Completed professional degree | 5.9% | 2.8% | 3.3% |
| Completed doctorate | 3.4% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Shackle Island. Using the proficiency score averages, the average test scores for Shackle Island, TN schools is n/a. The average student to teacher ratio is n/a. In Shackle Island, TN, an average of 95.1% of students have completed 8th grade and an average of 95.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cottontown, TN | 356 | 62% | 29.2% |
| Hendersonville, TN | 57,888 | 58% | 21.3% |
| Mount Juliet, TN | 35,834 | 56% | 16.8% |
| White House, TN | 12,258 | 44% | 9.2% |
| Gallatin, TN | 40,262 | 43% | 11.1% |
| Shackle Island, TN | 4,010 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ovilla, TX | 4,010 | 64% | 32.3% |
| Esparto, CA | 4,009 | 27% | 44.1% |
| Greencastle, PA | 4,008 | 69% | 44.4% |
| Wright City, MO | 4,012 | 36% | 24.3% |
| Clay Center, KS | 4,007 | 44% | 8.6% |
| Shackle Island, TN | 4,010 | n/a |
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