In this latest school adventure of the best-selling Jitters series, Mrs. Hartwell is out sick, so who will teach her class? Everyone has the jitters at the thought of a day without their favorite teacher! When the substitute teacher doesn't show up, the other adults in the building pitch in. The art teacher runs a writing workshop, the school nurse teaches science, and the math teacher leads reading! Alternating perspectives show the day from the students' point of view and from Mrs. Hartwell's as the kids keep her informed through a flurry of humorous electronic updates. 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.