| Index | Sadler | Texas | National |
| Average Test Scores | 51% | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Sadler | Texas | National |
| Completed 8th grade | 84.2% | 79.3% | 84.3% |
| Completed high school | 82.8% | 77.8% | 83.0% |
| Completed some college | 60.8% | 57.3% | 59.4% |
| Completed associate degree | 30.4% | 34.9% | 38.5% |
| Completed bachelors | 9.5% | 28.1% | 30.3% |
| Completed masters | 1.1% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 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 Sadler. Using the proficiency score averages, the average test scores for Sadler, TX schools is 51%. The average student to teacher ratio is n/a. In Sadler, TX, an average of 84.2% of students have completed 8th grade and an average of 82.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Callisburg, TX | 240 | 64% | 32.3% |
| Tioga, TX | 958 | 56% | 15.6% |
| Whitesboro, TX | 4,043 | 55% | 14.9% |
| Pottsboro, TX | 2,418 | 52% | 8.7% |
| Howe, TX | 3,204 | 48% | 0.3% |
| Sadler, TX | 490 | 51% | 6.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Scotia, CA | 490 | 50% | 3.1% |
| Silver Creek, NE | 490 | 55% | 14.6% |
| Gadsden, TN | 490 | 35% | 27.1% |
| Reserve, NM | 490 | 40% | 16.7% |
| Walsh, CO | 491 | 50% | 4.2% |
| Sadler, TX | 490 | 51% | 6.3% |
Here are the best places to live in Texas
Check out the 10 safest cities in Texas
These are the 10 most affordable cities in Texas
10 Best cities in Texas for employment