I haven't done a math lesson post in awhile and here is a fun one! It goes along with the Geometric Origami Mini Kit by Richard L. Alexander and Michael G. LaFosse.
This kit includes a booklet, a DVD and some mini origami paper. The booklet has instructions for six different origami items and the DVD demonstrates how to make all six. The nice part of having the DVD is sometimes origami instructions can be a bit confusing, so being able to actually see them is great. This is a fun kit that is very reasonable and each project lends itself to a math lesson. I made up a lesson for the first project for various ages and will give suggestions for the second one.