Before school lets out, Mrs. Tingle's class is going to need a substitute teacher.
Leigh Ann Watson is the brightest girl at Grandsboro High ... but her dreams of a much-needed college scholarship are sabotaged when her history teacher, the dreaded Mrs. Tingle, falsely accuses her of cheating. Desperate to prove her innocence, Leigh Ann conspires with her friends Luke and Jo Lynn on a scheme that will teach Mrs. Tingle a lesson of her own. Before they know it, however, their plan spins hilariously out of control ...