Graham Crackers Snack Tectonics and triangulations

http://www.windows2universe.org/teacher_resources/teach_snacktectonics.html

http://jclahr.com/science/earth_science/cr06/workshop/activities/snack/snack_tectonics.html

http://www.cpalms.org/Public/PreviewResource/Preview/19274

http://scieds.com/spinet/pdf/2005061_tri.pdf