It's probable that the default Schoology notification settings will be fine. If you want to get more or less emails, please follow the instructions below.
Account Notification Settings
Configuring Notification Settings.
Please check the notification settings for your Schoology Account. Every user (teacher or student) must decide on what how they want to be contacted, and what events or actions trigger those notifications.
Configure email updates.
Here you can decide whether or not you wish to receive email updates for different activities in the Schoology Courses. Custom allows you to deselect certain courses, on a granular level.
Second example shows ...