I've finally gotten off of my lazy butt and decided to post the whole darn lesson plan. This is because a number of teachers have located my blog, and emailed me requests for this lesson. I do have to admit that the idea is not my own, but I did add to the worksheet that I found. Originally the worksheet had only four problems on it, but I felt that a mere four problems would not be enough of a challenge to my students. Here you go! I hope this helps your students to learn area and perimeter. It certainly was effective for my kiddos.
Each cracker is about a square inch. So if you want a worksheet for this lesson plan, simply make sure that you are drawing rectangles that are in square inches. If you want a copy of the worksheet I made, email me and I'll try to get it to you sooner rather than later. I tried to put it on here, but it didn't work so well.
*** EDIT*** Found the website I got the worksheet (which I modified because I wanted it to have more problems): http://www.proteacher.net/.
