Are Students removing themselves from classes in google Classroom?

Google have recently added a setting to prevent this.

Bulk Reset User Password

This article is for Admins only to reset staff or students passwords in bulk

How to add users in bulk to realsmart groups

e.g. adding all of your year 7 students in to a new group

How To Reset Student Passwords Using Your Teacher Account

Reset a students password

Restrict the ability to reset students passwords

The realsmart default is to allow any staff member to reset any students password

Temporarily Protecting a group of Users