Add Students to Assignments

While you can assign a course to students from a course or an existing assignment, you can also add students to an existing assignment from the Students list,

Select Students in the top menu bar.
Select the ellipsis next to the student you want to add to an assignment, and then select Add Student to Assignment, or select the check box to the left of one or more students and then select the Assignment button above the list.
Select the assignment(s) from the list that you want to assign to the student(s).
When you have finished your selections, select Add.