Coaches can assign problem sets in two ways. Firstly, when creating a new problem set, coaches with students are given the option of assigning a problem set to a user. The assignment choice is made after using the Crete Set button. Sets assigned in this manner belong to the student, rather than the coach. Problem sets can also be assigned via the preferences button next to each student in the coach's student list. The current problem set can be changed and saved, just as any other preference, and this allows you to assign previously created sets to the user.