The law in many countries asks for a parent's or guardian's permission before a service keeps a young student's answers: under 13 in the US and UK, under 14 in Korea, and between 13 and 16 across Europe.
When a student below that age signs up, we email the parent or guardian a link. Once they confirm, the student can start tests — free tests included.
If the email did not arrive, check spam first, then ask us to send it again from the Contact page.