“I use my laptop to present in class and students laugh at my cluttered desktop.”

The Camouflage app (from the Apple App Store) makes the icons on your desktop disappear with one click (and reappear with another click). You have to pay for the most recent version, but the earlier version is currently free.

 

Recommended by ProfHacker: https://chronicle.com/blogs/profhacker/hide-your-desktop-clutter-with-camouflage/38985