You can use this add-on to find all the details of Google Classrooms™ in your domain. You can also add, remove or make owner teachers to any of the Classrooms. This add-on can also be used for quality assurance / work scrutiny procedures and allows you to gather Classrooms for particular pupils and add teacher accounts to all of their Classrooms.

Control Buttons are:
List all of the Google Classrooms™ in your domain
Create Google Classrooms™ (Owner, Teachers & Students)
Add Teachers to any Classroom
Remove Teachers from any Classroom
Make Teachers owner of any Classroom
Find all of the Classrooms for a Pupil
Add an account to all of their Classrooms
Remove an account from all of their Classrooms