The concept of Zoom Breakout Rooms is not difficult. They can be the same as small group discussion in a physical classroom setting.
The trick is which option to use for setting them up and then understanding the tips and tricks for running them smoothly.
This guide provides an easy-to-understand description of Zoom Breakout Rooms basics. It has been updated to include the new 3rd option where students can select rooms on their own.
This will be followed up with a booklet on the pedagogical uses of Zoom Breakout Rooms to suggest a plethora of learning opportunities that can be provided using them.
NOTE: This guide is a little out-of-date, but the updated version is coming soon.