Teacher accounts are needed for Basic and Premium subscriptions. You don't need a teacher account to use the Free version.
To register a teacher account in order to access the Basic and Premium subscription features, click the Register link from the front page.
Enter your information, and make sure you have entered the correct e-mail address. Then click the Register As Teacher button:
An e-mail with a confirmation link will be sent to your e-mail. Check your Spam or Promotions folders if you don't see it in your inbox.
Click the Confirm Account button in the e-mail:
You are taken to the confirmation page, where you are asked to type your new password twice in order to complete the registration:
That's it - you are now registered and you are automatically redirected to the Teacher Dashboard!
If you have received a license key from your organisation, you can Activate your license key.
Otherwise, you can purchase a new license.