Before you can delete a class you must remove the students from the class.

If the students are still part of the school you can follow this guide

Click ‘Settings’

Click ‘MANAGE’ in the Manage students box

*Optional* If you would like to remove a class not assigned to you, use the ‘Class filter’ on the top left. Untick ‘Only my classes’ to display all classes linked to the school account

If the class is empty of students you will see a ‘rubbish bin’/’trash bin’ next to the class name.

Click on the ‘rubbish bin’/’trash bin’ icon to delete the class