Decorah High School, Test Performance
| Year | Test | Grade | Measurement | Score | School District | State Average |
| IA | ||||||
| 2012 | Math | 11th Grade | % met std | 93.88% | 93.88% | 82.81% |
| 2013 | Math | 11th Grade | % met std | 95.71% | 95.71% | 82.19% |
| 2012 | Reading | 11th Grade | % met std | 95.89% | 95.89% | 83.97% |
| 2013 | Reading | 11th Grade | % met std | 92.14% | 92.14% | 83.26% |
Some data by SchoolDigger.com.
* The ranking was calculated based on publically available historical Math and English performance data.