Polygraph: Rectangles

At first glance, these are *just* rectangles, but many perimeters and areas have been strategically chosen. As students play, my hope is they will gain a deeper understanding of perimeter, area, and their independence. More here: http://www.nctm.org/Publications/Mathematics-Teaching-in-Middle-School/Blog/Vertical-Value_-Part-2/

By Cathy Yenca