Your favorite students and teachers are all here. That includes Sharie, who loves her striped-and-spotted umbrella more than anything; Kathy, who has a bad case of oppositosis; Jason, who has to read the longest book in the world; and the rest of Mrs. Jewls's class on the thirtieth floor, who are busily collecting toenail clippings. Everyone is scrambling to prepare for the all-important Ultimate Test, but meanwhile, there is a mysterious Cloud of Doom looming above them ...