SkyPrep lets you quickly create courses directly from your Materials page.
To create courses in bulk, use the checkboxes to select the Material you want to convert into Courses, then click on Convert to Courses.
Once you accept the prompt, one course will be created per material.
For example, if you selected three items, SkyPrep will create three courses, with each course containing one of the selected items. If you want to create a course that contains all three items, you will need to add the Materials directly through the Course's Course Content tab.