MS Masters uses Zoom for online classes. It is a secure tool: meetings are password-protected and waiting rooms are on by default, so participants join only once the host admits them. Hosts can also control who joins, disable a participant’s camera or microphone, and prevent screen sharing.
Zoom’s advantages include: free use (Zoom Meetings), easy operation, HD picture and high-quality audio, breakout rooms, several video feeds at once, joining from conference terminals, inviting others, recording, chat, muting participants and screen sharing.
Good luck!