Collaborations cannot be scheduled, included in modules, or graded, but they are a great way to share out google docs and google apps with a specific group and no one else.
Using Collaborations in Canvas
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Move a Student from One Section to Another in CanvasMove a Student from One Section to Another in Canvas
Both administrators and teachers can do this from the course roster of any course. There is a different lesson on how to add/drop students from courses.