On the iPad, use the Mute and Video icons to control if your microphone and camera are on or off.
Click on the More icon (...) to allow student to raise/lower hand and to send a chat message.
On a laptop or Chromebook, use the Mute and Video icons to control if your microphone and camera are on or off. Click the Participant icon to raise/lower hand (see far right). Click on Chat icon to send message to teacher.
Click on the ... icon in the bottom right of the participant window in order to raise/lower hand.