| Index | Greenbrier | Tennessee | National |
| Average Test Scores | 34% | 35% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 3 | 1,390 | 79,221 |
| Total private schools | n/a | 430 | 24,874 |
| Total post-secondary schools | n/a | 189 | 7,963 |
| Index | Greenbrier | Tennessee | National |
| Completed 8th grade | 83.7% | 82.0% | 84.3% |
| Completed high school | 82.3% | 79.9% | 83.0% |
| Completed some college | 50.2% | 53.2% | 59.4% |
| Completed associate degree | 26.6% | 32.2% | 38.5% |
| Completed bachelors | 18.1% | 25.4% | 30.3% |
| Completed masters | 6.0% | 9.3% | 11.5% |
| Completed professional degree | 0.7% | 2.8% | 3.3% |
| Completed doctorate | 0.5% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Greenbrier. Using the proficiency score averages, the average test scores for Greenbrier, TN schools is 34%. The average student to teacher ratio is n/a. In Greenbrier, TN, an average of 83.7% of students have completed 8th grade and an average of 82.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cottontown, TN | 356 | 62% | 29.2% |
| Hendersonville, TN | 57,888 | 58% | 21.3% |
| White House, TN | 12,258 | 44% | 9.2% |
| Ridgetop, TN | 2,441 | 39% | 18.8% |
| Pleasant View, TN | 4,660 | 37% | 22.2% |
| Greenbrier, TN | 6,859 | 34% | 28.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Mountainside, NJ | 6,859 | 77% | 60.4% |
| Newport, TN | 6,865 | 30% | 37.8% |
| Freeland, MI | 6,866 | 61% | 26.6% |
| Wescosville, PA | 6,848 | 60% | 24.0% |
| Idabel, OK | 6,872 | 33% | 31.5% |
| Greenbrier, TN | 6,859 | 34% | 28.8% |
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