Based off of the hit television show NUMB3RS, this lesson has students think about fair way to divide a quantity into even parts. Different algorithms are presented, including "I cut, you choose," and students are to choose which...

This lesson focuses on map coloring and the problem of proving that 4 colors would work for all maps. Francis Guthrie had to color a map of counties in England. He observed that four colors seemed to suffice for any map he tried, but he...