To provide a consistent and positive Hapara experience, it's important that policies set in the Google Admin Console apply to all students. Preventing students from signing into multiple Google accounts at once will decrease avoidance of these set policies.
To prevent students from using multiple Google accounts:
Click into Chrome Management, under Device Settings on the left side of the screen.
Click on User Settings.
Select a Student Organizational Unit you'd like to apply this setting to. You can apply this at the domain root level if you wish, but this would also prevent staff from using multiple Google Accounts.
Search for Multiple Sign-in Access in the 'Search settings' box
Select Block multiple sign-in access for users in this organization from the drop down.