Jane Jensen has spent years building a successful errand business. To meet her clients' growing demands, Jane needs staff. Applicants prove scarce, and she visits a local high school to hang "Help Wanted" posters and inadvertently steps into a labor crisis.When she is mistaken for a substitute teacher, Jane is too intrigued to object and finds herself standing in front of a class of skeptical teenagers. A deer in the headlights at first, she soon...