Yo need to be a HOST to do the following:
They will be able to use mic, webcam and manage the presentation
To give presenter rights to all of your students at once,
1. click on Meeting in the top menu,
2 select Manage Access & Entry
3 and then click on Auto-Promote Participants to Presenters.
To give presenter rights only to some students,
1 . hover over a student name in Attendee pod.
2. This will bring up a menu. Click on Make Presenter.