To add/edit enrollment rows:

1) Navigate to Core.
2) Select Users > Edit User Profile Data
3) Search/select the student.
4) Scroll to the lower left under System Information.
5) Click Student Enrollment.
6) Click Edit to the right of any enrollment row to update a Users current Enrollment (ex. change Grade Level, mark Repeated).
7) Click Enroll in School in the upper right to add a new enrollment row. Select the School Year and Grade Level
8) Click Save or Save & Exit