Remember, the youngsters we try to function with in the common workplace are not the Dean's List, Alpha Males and Females, Who is Who in American High School, outstanding sportsmen and women, and extracurricular enthusiasts that all high schools produce today. You won't find these individuals in blue collar manual labor jobs but they may be in the back as superintendents, managers in a department store, or perhaps just eye candy in the store front to whom the Public can relate that is "advertising" for the business, but they won't necessarily be out stocking shelves, unless they just like to do that to stay busy. The good ones always find work.
Alright Dee...how would you write up the method to teach a kid how to return change in an overpaid cash transaction?