Please confirm your Class Code with your teacher. If your teacher updated the Class Code, the old one becomes invalid.
I got an error that the Username has already been used. Now what?
If you think you might have previously created a Brainingcamp account, please ask your teacher for the password for that account. Please note that you need a different account and Username for each different teacher you have. It is also possible that someone else has already taken the Username you are trying to create in which case you can add a personalized prefix/postfix to prevent potential conflict with common names. A Username like 6A_john_smith@springfieldk12.org is likely to be unique.