Then, I was on Facebook, and I saw a post from the Math Coach's Corner about her rekenreks. (She has more detailed instructions on her blog post.) I thought that looked WAY easier than what I had done last year. I used foam board because I had it lying around and was going to be one less thing I had to purchase. However, the foam board is sturdier than the foam sheets so if you have the extra time and elbow grease I say go for it. I also like the contrast the black foam provides.
After measuring (4"x6" rectangles), cutting, and sanding all the crazy edges I hole punched through them with the Crop-a-Dile. I disassembled the poorly made ones from last year and rethreaded these. I even added a star with silver Sharpie in the top corner as an easy reference for the kiddos when we start to use them. My husband helped too! He's the best. I think they turned out great and I'm excited to use them this year.