To join a class , you just need to enter the class code once. After you join, you don’t need to enter the code again. If you forget, lose, or delete the code before you join the class , ask your teacher to share it with you. Official Google Classroom Help Center where you can find tips and tutorials on using Google Classroom and other answers to frequently asked questions. To create or join class video meetings, we recommend that you install the Google Meet app. If they aren't already on your device, you can get them from Google Play (Android) or the Apple App Store (iOS).