Tessellations of Pentagons: Hands-On Activity #3 (medium image)
Practice the Second Pentagon Technique (Hard) --- Totally Tessellated @ http://library.advanced.org/16661/
Instructions: Print this page and then close this window. Cut out these pentagons. (You don't have to cut out all of them.) Using the web page about the second pentagon technique as a guide, try to form a tessellation out of the pieces you have cut out.