Think-Pair-Share: The Basics! — from lillyconferences.com by The Scholarly Teacher Team
Think-Pair-Share is a collaborative learning strategy that promotes critical thinking and peer learning. This is an excellent place to start if you want to add active learning to your lecture-based course without taking much class time.

From DSC:
The ability of many videoconferencing systems to automatically create breakout groups/sessions for you can be very helpful here.