Chelsea High School, Test Performance
| Year | Test | Grade | Measurement | Score | School District | State Average |
| OCCT | ||||||
| 2010 | Algebra I | End of course | % met std | 69% | 69% | 69% |
| 2011 | Algebra I | End of course | % met std | 62% | 62% | 74% |
| 2010 | English II | End of course | % met std | 79% | 79% | 85% |
| 2011 | English II | End of course | % met std | 92% | 92% | 86% |
| 2009 | Math | End of course | % met std | 72% | 72% | 81% |
| 2009 | Reading | End of course | % met std | 83% | 83% | 77% |
| 2009 | Science | End of course | % met std | 63% | 63% | N/A |
| 2010 | Science | End of course | % met std | 78% | 78% | 75% |
| 2011 | Science | End of course | % met std | 78% | 78% | 79% |
Some data by SchoolDigger.com.