Don't worry, these things happen. Just enter the email address you used to register with GCSE Mathematics Online and your username, and we'll send you a link to reset your password.
If you have changed your email address since you registered please ask the teacher who administers your school's GCSE Mathematics Online account to update your email and reset your password.
If you have forgotten your username then ask your teacher administrator.
If you still can't login then contact us.