Dear [name of administrator]:
I have invited you to become an administrator for Vocabulary.com's Educator Edition. By now you should have received an auto-generated message from Vocabulary.com, inviting you to set up your account. Once you do, you'll be able to track all the data for our school/district and invite other administrators, power users and teachers to the account.
The email message contains a link that will get you started. If it's not in your inbox, check your spam folder.
Please let me know if you have any questions.