Mrs. Hartwell is home sick today, and throughout the day her students send her emails informing her about what is happening as the other teachers take turns watching the class-and the room becomes increasingly messy. In this latest school adventure of the best-selling 'Jitters' series, Mrs. Hartwell is out sick. Who will teach her class? Modeling the importance of staying home when sick and resting to get better, this is a funny and heartwarming addition to the beloved series reminding readers that everyone gets the jitters.