| Index | Gardiner | Montana | National |
| Average Test Scores | 57% | 45% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 408 | 79,221 |
| Total private schools | n/a | 77 | 24,874 |
| Total post-secondary schools | n/a | 32 | 7,963 |
| Index | Gardiner | Montana | National |
| Completed 8th grade | 91.5% | 89.4% | 84.3% |
| Completed high school | 90.0% | 88.2% | 83.0% |
| Completed some college | 70.3% | 63.1% | 59.4% |
| Completed associate degree | 50.3% | 38.6% | 38.5% |
| Completed bachelors | 45.2% | 29.9% | 30.3% |
| Completed masters | 15.8% | 9.8% | 11.5% |
| Completed professional degree | 2.6% | 3.0% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Gardiner. Using the proficiency score averages, the average test scores for Gardiner, MT schools is 57%. The average student to teacher ratio is n/a. In Gardiner, MT, an average of 91.5% of students have completed 8th grade and an average of 90.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Gardiner, MT | 893 | 57% | 18.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Lansing, IA | 893 | 80% | 66.7% |
| Riverton, KS | 893 | 26% | 46.9% |
| Long Grove, IA | 893 | 87% | 81.3% |
| Montandon, PA | 892 | 60% | 24.0% |
| Richfield, NC | 892 | 40% | 17.7% |
| Gardiner, MT | 893 | 57% | 18.1% |
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