What "Reset Course Content" Really Does… and How to Undo It

I figured this out myself when I was an account admin at a Canvas institution, and I have since seen it described in comments here on the community too, but I thought it might be good to formally com...

Did anyone else bring home any really mundane souvenirs?

My most mundane souvenir: I swapped out my Kroger Plus key tag for one from the City Market down Route 6 in Dillon.