Units
A unit is a group of assignments. In any given instance of the Coursework feature, you must always have at least one unit defined. Apart from this restriction, you can create as many units as appropriate for your course, organizing them with any system you like.
Notice
You might create a series of units that represent the general progression of the course (“Week 1”, “Week 2”, etc.), or your units might coincide with topics you will cover (“Faulkner”, “Hemingway”, etc.).