[carrollgt91]

Great tutorial. I love these interactive lessons, but one thing I'd love to see in this tutorial (and many others like it) is something that Michael Hartl does in railstutorial.org, which is an extra credit section.

In the later sections of the tutorial, the addition of some suggestions for extending each example would be great. You don't need any "stuck" functionality or anything like that here; just some casual examples of how else you could use the subject of the tutorial would really help solidify the concepts.