１. Click a Room Key link.
２. Choose which type of email you want to proceed with.
２-１. Click Sign In with Google.
２-２. Enter your Google/Gmail account and click Next.
２-３. Enter your password and click Next.
２-１. Click Sign in with your email address.
2 - 2 Enter your email and Click Send verification code.
２-２. Check a message titled Welcome to ClassDo in your email account. Enter the six-digit verification code received in the email and click Submit.
３. At the account registration screen, enter your first name and last name. Click Next.
４. You will be guided to a device test before entering the invited room. Conduct the test to participate in a live session.