| Index | Green Grass | South Dakota | National |
| Average Test Scores | n/a | 48% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
| Index | Green Grass | South Dakota | National |
| Completed 8th grade | 55.6% | 89.1% | 84.3% |
| Completed high school | 55.6% | 86.8% | 83.0% |
| Completed some college | 22.2% | 60.4% | 59.4% |
| Completed associate degree | 22.2% | 38.5% | 38.5% |
| Completed bachelors | 22.2% | 27.5% | 30.3% |
| Completed masters | 22.2% | 8.1% | 11.5% |
| Completed professional degree | 0.0% | 2.5% | 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 Green Grass. Using the proficiency score averages, the average test scores for Green Grass, SD schools is n/a. The average student to teacher ratio is n/a. In Green Grass, SD, an average of 55.6% of students have completed 8th grade and an average of 55.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Eagle Butte, SD | 1,458 | 27% | 44.4% |
| Green Grass, SD | 22 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Wolford, ND | 22 | 60% | 25.0% |
| Inkster, ND | 23 | 51% | 6.3% |
| Coulterville, CA | 23 | 30% | 37.5% |
| Bynum, MT | 25 | 35% | 27.1% |
| Macomb, OK | 25 | 34% | 30.2% |
| Green Grass, SD | 22 | n/a |
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