Every on-site batch at your campus sends its students an email before each class. You do not need to switch anything on. Open Teaching → Class reminders to change it for a batch.
Step 1: Open Class reminders
Under Teaching in the menu. Batches that have ended are not listed.
Sign in to open this screenStep 2: Switch a batch on or off
Untick On to stop reminders for that batch.
Step 3: Choose when
Pick how long before each class the email goes. It applies from the next class.

