There are many ways to interact when you are participating in a live lesson.
From left to right the buttons at the bottom allow you to:
Chat with the teacher or the class group
See who else is in the lesson
Raise your hand to ask a question (the teacher will be notified)
Toggle your video on and off
Toggle your microphone on and off
Toggle the iPad speaker on and off
There are additional items available by clicking on the meatballs
The big red button can be pressed to leave a lesson
Any messages will appear as a banner along the top of the screen. You can cancel them by pressing the cross on the banner
Behaviour in live lessons should be exemplary, any behaviour issues will be referred to a head of department or head of year.