Magic Classroom Admin is an all in one Google Classroom™ manager tool that will give you the ability to find, edit and create Google Classrooms™ across 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 (inc. Archived if required)
Create Google Classrooms™ in bulk (Owner, Teachers & Students)
Add Teachers to any Classroom
Remove Teachers from any Classroom
Make Teachers owner of any Classroom
Archive Classrooms
Add Pupils to Classrooms
Find all of the Classrooms for a Pupil
Add an account to all of their Classrooms
Remove an account from all of their Classrooms