I think this STAIR is a great visual tool to teach area and perimeter. The images that are used a key in teaching how to find the area and perimeter. The bright colors and fun pictures will keep students attention and keep their interest througout the lesson. There was a just right amount of information before the quiz questions started and there was a good amount of questions to support students learning. You did a nice job when a student got an answer incorrect. I like how you gave them a different way to solve it (try using paper and pencil). It gave them a reminder of what they needed to do.
One problem that I had, were a few of the buttons to move to the next pages i had to click several times. I am not sure what caused this problem.