If you need to work with Google Classroom, use myViewBoard Classroom. To access myViewBoard Classroom, sign in to myviewboard.com, and click the myViewBoard Classroom link. 

NOTE: This option is available only for accounts under an education entity.

myViewBoard Classroom automatically integrates with Google Classroom after signing in with a supported account. myViewBoard Classroom supports two-way sync with Google Classroom. Changes in myViewBoard Classroom are automatically synchronized with your Google Classroom account.

For more details, visit the following link:

https://wiki.myviewboard.com/Classroom_Management