January 2011
Beginner
216 pages
5h 54m
English


Many years ago, when I taught ninth grade physical science, I divided my students into groups, assigned each group a family of the periodic table of elements, and had them come up with a song for remembering that family. They embarked on the song project with relish, including not only the elements but also the characteristics of that family, referencing the number of valence electrons and other details. Fast forward to 2006, when I was at the mall with my sons. Three young men walked up to us and said, “Hey, ...