Can I Present the Same Deck to Different Groups?
When you create a slide presentation, or deck, the file is stored in your Google Drive. You can open it, edit it, and present it as much as you want.
When you are done presenting a particular deck, just click the "More Actions" menu in the lower right-hand corner of your screen and select "End This Session."
Now you can name this Session. Later you can present the same slides to another group and save their answers separately.