Twelve-year-old genius, Jordana Simkins, has decided to be a teacher. Luckily, Jordana is unusually tall for her age and has very supportive parents and a best friend named Emily to help her prepare for her first day of substitute teaching. While overcoming first-day jitters and kindergartners with wet pants, Jordana must deal with a vice-superintendent, Luella Trites, who believes Jordana is too young to teach. Ms. Trites does her best to ruin Jordana's career by insisting on extra supervision and dropping by Jordana's classroom to complain about her methods. How will Jordana make it through her first day as a substitute teacher?