You should receive your confirmation email within an hour. Your confirmation email is sent to the email address you provided during registration.
If you completed the first step of registration, but didn't get your confirmation email, please check any junk or bulk folkers for a message from discovery.com. The confirmation message may have been inadvertently flagged as spam by your email service provider.
Check with your school/district system administrator to ensure that the @discovery.com domain name is included in the school's safe senders list.