Who says teaching doesn't pay?
Probably not Libbi Sparks. The Independence high school teacher recently cashed in a career's worth of math lessons to the tune of $30,000.
Sparks teaches math at William Chrisman High School in Independence, Missouri, and has nearly three decades of experience teaching in public schools.
She's taught everything from middle school pre-algebra to dual-credit Calculus II. In 2012, she earned prestigious National Board certification.
In other words, she knows what she is doing.