What's the current state of this tutorial? Is the one currently on commonmark.org the winner?
I tested it on my wife and two co-workers. The interactivity is great, but, unfortunately, the questions and exercises could be more carefully worded. My wife was so frustrated with it that she got up from the table and left with only the words ("I can't").
The current tutorial fails to put the instructive content (i.e., what syntax to use or the concept of a hard break) side-by-side with the exercise. It also introduces three difficult topics (links, images and code) way too early for non-coding users.