My students have been asking for online tutoring sessions. At school, it is often done by other teachers, and all of them use the Facebook Live platform. It is generally well-received, but I don't have a Facebook account, nor have any interest in making another one. I'm inclined to use Google Hangouts (to allow them to send me voice messages), but I don't want them all to stay in the call, since their microphones will likely stay on and add noise to the call.
I expect to have about 50 simultaneous students watching, but only 5-10 will ever ask questions.
Is there a way to mute everyone but myself on a call, and then selectively unmute one of them on demand?
Or maybe mute everyone, but still allow them to send (short) voice messages?