You can delete or "archive" a class in your class settings. Scroll down to “Advanced” and select “Archive.”
Archiving is a permanent action. It deletes the class and its information, so it will no longer appear in your "My Classes" list on the teacher homepage and cannot be unarchived. You can see a list of archived classes in “My Classes” by clicking on “Archived Classes.” Only a class with at least one student can be archived.
Note: When you archive a class, you can still import your game customizations (such as your powers, sentences, behavior presets, game rules, etc.).
Although archiving a class also archives student characters, it does not delete their student accounts. Learn more about archiving and the Student Lifecycle here.