After you check your schedule for the day, it's expected that you check your Google Classes in the morning, and by reading the announcements and assignments due, know what needs to be completed that day.
However, whenever a teacher posts to the Class you might receive an email, which adds up to many disruptive emails during the day. You should disable notifications so that you are not interrupted by these distracting emails.
Click on the hamburger menu icon.
2. Scroll to the end of the menu and click on the "Settings" gear icon.
3. Turn the toggles off for email notifications.