Preston High School, Test Performance
| Year | Test | Grade | Measurement | Score | School District | State Average |
| IA | ||||||
| 2012 | Math | 11th Grade | % met std | 90.48% | 90.48% | 82.81% |
| 2013 | Math | 11th Grade | % met std | 79.17% | 79.17% | 82.19% |
| 2012 | Reading | 11th Grade | % met std | 90.48% | 90.48% | 83.97% |
| 2013 | Reading | 11th Grade | % met std | 79.17% | 79.17% | 83.26% |
| 2012 | Math | 7th Grade | % met std | 90.00% | 90.00% | 78.81% |
| 2013 | Math | 7th Grade | % met std | 82.76% | 82.76% | 78.31% |
| 2012 | Reading | 7th Grade | % met std | 80.00% | 80.00% | 67.39% |
| 2013 | Reading | 7th Grade | % met std | 65.52% | 65.52% | 68.56% |
| 2012 | Math | 8th Grade | % met std | 100.00% | 100.00% | 74.62% |
| 2013 | Math | 8th Grade | % met std | 84.62% | 84.62% | 74.59% |
| 2012 | Reading | 8th Grade | % met std | 84.00% | 84.00% | 66.08% |
| 2013 | Reading | 8th Grade | % met std | 64.10% | 64.10% | 66.34% |
Some data by SchoolDigger.com.