You must first delete user accounts and students associated with the organization.
- Click the organization dropdown, and select the organization you want to delete.
 - Delete all the user accounts in that organization.
 - Remove all student test registrations. See the What's Next section on the Register/Unregister a Student page.
 - Remove all students from the organization by either:
 
- Enrolling students in another organization, as described in Manage Student Enrollments in an Organization. 
or  - Deleting student records, as described in Delete a Student Record.