It is possible for a teacher to transfer a student (activated in the platform) to another class without going through the activation process again.
Select Manage classes from the home screen and access the group linked to the student being transferred
Select the box on the left of the student's name
Select Move students to located on the top right corner of the student list
Select the new class and confirm the change
Once completed, all the students selected will now be seated in the new class.