Why do so many things in literature happen in 3s? Ever wonder about the symbolism of Gatsby’s green light, Hester Prynne’s scarlet letter, why Charlotte Perkins Gilman made the wallpaper in her famous story yellow, or what’s up with groups of 7 and 12? This lesson is brimming with information (165 color idioms and 65 number symbols) and options—stations, bingo, and a self-grading puzzle reveal activity! Help your students understand the rich implications of color and number symbolism in literat