I'm in the same boat as I teach Algebra I for special ed students and anything that involves a number of steps really throws them, as does change. I too would like to use discovery based lessons and can't wait for next year when I can introduce this approach right from the beginning, rather than trying to do it part way through the year. My students tend to be very anxious and insecure about math, and anytime they figure things out for themselves their self-esteem goes up a notch.
I like how you have said that you feel this is an enhancement of your course. I think this AFA is a resource to use in my class to make it better. I like many of the activities and feel that they help reach all the different learners. I think when I get to my class (it is summer right now), I will use it as springboards to next levels.
What did you feel was your best lesson so far that you have dazzled students? What were your students responses from those assignments?