| Index | Gardner | Florida | National |
| Average Test Scores | n/a | 55% | 48% |
| Student/Teacher ratio | n/a | 17:1 | 16:1 |
| Total public schools | n/a | 3,388 | 79,221 |
| Total private schools | n/a | 1,640 | 24,874 |
| Total post-secondary schools | n/a | 466 | 7,963 |
| Index | Gardner | Florida | National |
| Completed 8th grade | 95.2% | 84.0% | 84.3% |
| Completed high school | 95.2% | 83.0% | 83.0% |
| Completed some college | 53.2% | 58.0% | 59.4% |
| Completed associate degree | 22.7% | 37.4% | 38.5% |
| Completed bachelors | 16.4% | 27.9% | 30.3% |
| Completed masters | 6.7% | 10.0% | 11.5% |
| Completed professional degree | 3.3% | 3.1% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Gardner. Using the proficiency score averages, the average test scores for Gardner, FL schools is n/a. The average student to teacher ratio is n/a. In Gardner, FL, an average of 95.2% of students have completed 8th grade and an average of 95.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Wauchula, FL | 4,801 | 58% | 20.2% |
| Zolfo Springs, FL | 2,149 | 56% | 17.2% |
| Arcadia, FL | 8,187 | 38% | 20.2% |
| Gardner, FL | 367 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Herrick, IL | 367 | 32% | 33.3% |
| Summersville, MO | 367 | 48% | 0.5% |
| Belview, MN | 366 | 25% | 47.9% |
| Palisade, NE | 366 | 40% | 16.7% |
| Brewster, KS | 366 | 38% | 21.9% |
| Gardner, FL | 367 | n/a |
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