If you would like to make it so that your students who are 13 and older can not sign up with their email address you can follow these steps:
- Login in to your account and go to your Dashboard
- Click the 'Student Codes' link/tab at the top of the page
- Click the row for the student code that you would like to configure to not allow email address sign ups
- In the 'Settings' area, make sure the checkbox is unchecked for "When students over 12 register, allow them to use their email as their username & full last names."
- Click 'Update'
Please note - per student privacy laws, students under the age of 13 are not ever permitted to sign up with an email address.