This book originally appeared in 1986, and has long been out of print. I re-used some of the ideas in subsequent books, (Algebra: Themes, Tools, Concepts and especially Geometry Labs,) but some of the material can only be found here.
You can download parts or all of it for your non-commercial use:
Tiling Rectangles with Pentominoes is an extension of page 27.
(It can stand alone if students know the names of the pentominoes)
