| Index | Gardner | Kansas | National |
| Average Test Scores | 45% | 35% | 48% |
| Student/Teacher ratio | 14:1 | 14:1 | 16:1 |
| Total public schools | 6 | 970 | 79,221 |
| Total private schools | n/a | 190 | 24,874 |
| Total post-secondary schools | n/a | 86 | 7,963 |
| Index | Gardner | Kansas | National |
| Completed 8th grade | 90.3% | 87.4% | 84.3% |
| Completed high school | 89.9% | 86.1% | 83.0% |
| Completed some college | 71.3% | 63.7% | 59.4% |
| Completed associate degree | 43.9% | 39.8% | 38.5% |
| Completed bachelors | 33.7% | 31.6% | 30.3% |
| Completed masters | 9.2% | 11.4% | 11.5% |
| Completed professional degree | 0.9% | 3.0% | 3.3% |
| Completed doctorate | 0.2% | 1.2% | 1.3% |
There are a total of 6 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, KS schools is 45%. The average student to teacher ratio is 14:1. In Gardner, KS, an average of 90.3% of students have completed 8th grade and an average of 89.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Edgerton, KS | 1,750 | 75% | 55.2% |
| Mission, KS | 9,618 | 56% | 16.1% |
| Overland Park, KS | 193,412 | 55% | 13.9% |
| Lenexa, KS | 54,804 | 50% | 3.5% |
| Shawnee, KS | 65,844 | 50% | 3.3% |
| Gardner, KS | 21,936 | 45% | 7.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Summit, NJ | 21,913 | 81% | 69.3% |
| Bloomington, CA | 21,907 | 33% | 30.5% |
| Marina, CA | 21,966 | 27% | 43.4% |
| Bloomingdale, IL | 21,905 | 52% | 7.9% |
| Leland, NC | 21,903 | 42% | 13.1% |
| Gardner, KS | 21,936 | 45% | 7.3% |
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