Mr. O'Connell
| Full name | Casey O'Connell |
|---|---|
| Preferred name | Mr. O'Connell |
| Classes taught | Chemistry, Chemistry H |
| Room(s) | J-6 |
| Department | Science |
Mr. O'Connell, full name Casey O'Connell, is a chemistry teacher that teaches Chemistry and Chemistry H at Gunn High School commonly known more for shocking statements than teaching chemistry. Most students consider him to be a worse Chem H teacher than Dr. Mellows since he does not give instruction on course content and students are less likely to achieve a more desirable letter grade in his class since summative assessments are weighted more than usual.