Your username is a randomly generated combination of possibilities. Due to the high volume of accounts (100,000+ teachers and millions of students) we have a standardized system to eliminate the possibility of duplication. At sign up you have the option of cycling through potential usernames by clicking the red icon (seen below) until you find a username that you like. Once you confirm your account, that possibility no longer exists. We can change your password through our support desk, but unfortunately we cannot change your username once established.