Miss Huff looked over her class and sighed deeply. Sarah was sticking her tongue out at Emily. Billy was making faces at Carl. Nancy blew such a big bubble that she floated across the room and got stuck in Francine”s hair. When Miss Huff accidentally mixes up her plans for the substitute teacher with her day-off activity list, well, things get pretty crazy. After all, how many substitute teachers can build a monstrous sand castle, parachute from a plane, and swim underwater...with an octopus? Put down your pencils and strap into your seats, because this class is about to experience some serious turbulence!