Hello @nayereh_tohidi
With Zoom, you should be able to allow participants(Students) to Host of Co Host the meeting you setup. Once they are able to be a Co-host or Host of the meeting, they should have the ability to share their screen to do their Oral presentation.
Your school might have some special instructions on how to do this depending on the Zoom integration they use for your Canvas instance. I was able to find THIS guide from Zoom on Managing participants in a meeting. if needed, your institution's helpdesk might be able to clarify how you can do that if it looks different than the guide I linked you.
Hopefully this helps!
-Colton
