Hi @isutherland
Welcome to the Canvas Community. There is a way to do this, but please be aware this is the "nuclear" option and should absolutely, positively NOT be used in a course site where student work has already started, as everything will be eliminated....and that means everything. (Submissions, discussion replies from students, etc.)
With that warning, the way to do this is outlined here: How do I reset course content? When the course site is "clean" again, you may want to try a selective course import, outlined here: https://community.canvaslms.com/docs/DOC-13101-4152497985
I hope this helps, Ian.
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