| Index | Gardner | North Dakota | National |
| Average Test Scores | n/a | 44% | 48% |
| Student/Teacher ratio | n/a | 12:1 | 16:1 |
| Total public schools | n/a | 272 | 79,221 |
| Total private schools | n/a | 47 | 24,874 |
| Total post-secondary schools | n/a | 30 | 7,963 |
| Index | Gardner | North Dakota | National |
| Completed 8th grade | 84.1% | 90.7% | 84.3% |
| Completed high school | 84.1% | 88.3% | 83.0% |
| Completed some college | 40.6% | 64.6% | 59.4% |
| Completed associate degree | 29.0% | 41.6% | 38.5% |
| Completed bachelors | 20.3% | 28.2% | 30.3% |
| Completed masters | 0.0% | 7.7% | 11.5% |
| Completed professional degree | 0.0% | 2.4% | 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, ND schools is n/a. The average student to teacher ratio is n/a. In Gardner, ND, an average of 84.1% of students have completed 8th grade and an average of 84.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hendrum, MN | 216 | 75% | 56.3% |
| Harwood, ND | 725 | 65% | 34.4% |
| Blanchard, ND | 10 | 50% | 4.2% |
| Hunter, ND | 256 | 43% | 10.4% |
| Gardner, ND | 96 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Campo, CO | 96 | 50% | 4.2% |
| Klingerstown, PA | 96 | 65% | 34.4% |
| Retsof, NY | 96 | 49% | 1.6% |
| Sarahsville, OH | 96 | 59% | 22.9% |
| Council Hill, OK | 95 | 21% | 56.3% |
| Gardner, ND | 96 | n/a |
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