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Verifying Teachers in Google Classroom
As the Google Apps admin for your school, you’ll need to decide how teachers are given permission to create and manage classes in Classroom. When users first sign in to Classroom, they are asked to identify themselves as a teacher or a student. Everyone who identifies as a teacher is added to a Google Group, pending your review.
You have three choices as to who is allowed to create a class: anyone in your domain, all pending and verified teachers, or verified teachers only.
To set this permission you’ll need to enable Google Groups for Business and follow these steps.
You can also directly add teachers from your domain to the teacher group before they begin using Classroom. To learn more, visit the Help Center: http://goo.gl/CbjuZQ