If your school allows for parent registration, then the parent login page will have an option for creating an account.
Click on the "Create Account" link at the bottom
After you register your account you will receive a confirmation message
After registration you will be asked to add a student to your account:
Enter the first name and last name of your student/child
If you have more than one student to register then click "Add Student"
When you are finished, click "Save Changes" and then click "Close"