Li’l Jacob

 In a previous post I had written about a structure that I am planning to teach to a group of fourth graders next month.  There's a fun folding trick to it that feels like magic: its two panels flex in such a way that allows the front and back covers to reverse positions, and it offers two different configurations of the…

Fractions / Accordion Book

Here's the rest of what I started in my last post about this book with the narrow accordion spine.  What I like about combining this structure with fractions is that it makes a concrete (ok, paper) connection  between the relationship of different "families" of fractions to each other.  For instance, just by looking at the…

Hexagon-Flexagons: Post 2, Fractions

Except for the last picture, all of the images in this post exist on one hexagon-flexagon. In my last post I showed hexagon-flexagons that were about making designs with pencil, paper, and gouache. When I was making the design for this post I was thinking more about math. Okay, now here I go,showcasing my hexagon-flexagon as way to illustrate fractions, rather…