There are two ways to collaborate, or be allowed to collaborate in Contribute Cloud. The first is that the host/teacher can give you collaboration privileges. They do this by clicking on the bell icon to open the notification window. They they click on the check box next to your name and you can now collaborate with them on a shared work area.
The second way is that you are the student or participant can request collaboration by clicking on the bell icon in the top right of the screen, then putting a check in the box to request collaboration with your teacher / host.
