Students under the age of 13 are not required to have an email address to register with GrammarFlip. These students do, however, need to create a unique username and provide a first name and last initial. The information these students provide (username, first name, and last initial) should not provide individually identifiable information about themselves. Teachers are encouraged to guide their students in best practices for creating non-identifiable usernames.
At the top of the "Student Registration" page, simply check the box indicating that you do not have an email address and the system will prompt you for a username: