In some cases, you may want to manually create a class instead of having it sync from your roster. Classes can be added manually from the Classes menu.
Adding a new class
Click the Add New Class button to begin, then select Add New Class from the dropdown menu.
From the sidebar that appears, assign the class to a location, then give it a name and description.
Pressing Add will create the class and immediately take you to the class edit screen. You can get back to the class edit screen at any time by clicking on the class name from the Classes screen in card view, or the class's row in table view.
From this screen, all attributes of a class can be edited. You can also add teachers and students to the class. Students can be added manually by email address or from the linked Google Directory.