You can assign previous class activities when a new student joins your class, if you notice the assignment number for a student doesn’t match the rest of the class, or when you want to retroactively give assignments.
ADDING A NEW STUDENT & ASSIGNING PREVIOUS CLASS ACTIVITIES
When a student is added to the class, click the checkbox to assign previous class activities. 

RETROACTIVELY ASSIGNING CLASS ACTIVITIES
- Access your student list by selecting the class on the left menu.

- You are automatically directed to the student roster in your Class Dashboard. Locate the student needing previous assignments and click on the pencil icon to edit.

- Click the checkbox to assign previous class activities.

- Click Update Student.