Join a Meet by clicking on the Meet link. Depending on your teacher, the link might be posted in Google Classroom, shared in an email, or in an event in Google Calendar. If you are using a phone or a tablet, you will be asked to open the Meet app (Samsung/Android app, iPhone/iPad app) to join the meeting.
If the video or audio is breaking up, you can sometimes make it better by turning off your video. Look for the video button (see picture above) to turn the video off.
If you’re on a laptop or Chromebook, you can also use a phone to call the meeting to hear what people are saying. To find the phone number for the meeting, click on the button in the lower left corner to show the joining info. Write down the phone number and the PIN. Dial the phone number, and after the automated welcome message, dial the PIN numbers, followed by the # button.