An Oregon teacher has invented a way to help teachers plan digitally, and it's turned into a very lucrative second career. Elmira High School teacher Jeff Hellman is the inventor of Planbook, a software program designed to help teachers throw out their old paper planners. So far, sales of the program are soaring. brass recently visited Elmira High School to talk with students about personal finance and writing for the magazine. Have you invented a new teaching or planning tool? Tell us about it or let us know about teaching innovations that helped you.