School enrollment information certainly does change, and occasionally students move into a school or district after the enrollment information has been uploaded.
If you cannot locate a student for one of your classes, use the link labeled Notify Support about Missing Students on the Add Students page. You can report multiple missing students on one form by using the plus sign to add another set of fields for student information. When we receive your submission, Castle Learning Customer Support will notify an Administrator account holder at your school or district to approve and assist in creating the account you’re missing.