Under My Teacher's Desk — Arnold Ytreeide

Strange things are happening at Rachel Steerman Elementary! So five fourth graders jump in to investigate, and land in an adventure that takes them to a world that can't possibly exist...but does! As they try to escape to warn the "upworlders" they learn a lot about themselves, about others, and about the importance of education, until finally they solve the mystery of what's living ... under their teacher's desk!