Thank you @mosterhout for submitting this question! Based on the inquiry you made about two years ago, I feel that this is a better discussion than a question that has a single “correct” answer. However, because another Community member has clicked the “I also have this question!” button, I am unable to convert it to a discussion for an ongoing conversation.
Because it is my goal to clean up the K-12 space before the end of 2018 so only the only open questions are those that are still relevant! With that goal in mind, I am going to mark this question as “Assumed Answered” so it is removed from the list. The status will not prevent Community members from contributing and continuing this conversation!
Just came across this post. We have an elementary music teacher doing some amazing things in Canvas! He's transformed his weekly practice logs into Canvas quizzes that are submitted each week; he's posted videos demonstrating techniques; and he has students use the video recorder to submit their practices for feedback.