15 lifelong money lessons you're never taught in school

Sean Gallup/Getty Images Less than half of states in the US require that students at public high schools take a personal finance class before they graduate. At the end of the day, many of us are never taught money basics — we simply learn through trial and error upon entering the "real world." Here are 15 essential money concepts to grasp that may have slipped through the cracks in grade, middle, and high school. UC San Diego/Facebook How to pay for college "We spend tons of time helping kids...