Class 507 is the worst class Ms. Bryce has ever taught. And she would know--she's been teaching forever. They are so terrible that when a science experiment goes disastrously wrong (again), Ms. Bryce has had it and quits in the middle of the lesson. But through a mix-up, the school office never finds out.u003cbru003eu003c/bru003eu003cbru003eu003c/bru003eWhich means ... Class 507 is teacher-free!u003cbru003eu003c/bru003eu003cbru003eu003c/bru003eThe class figures if they don't tell anyone, it'll be one big holiday. Kyle and his friends can play games all day. Samantha decides she'll read magazines and give everyone (much needed) fashion advice. Adam and Lizzie are free to doodle everywhere without getting in trouble. Eric will be able to sit quietly and write stories with no one bothering him. And Maggie ... well, as the smartest kid in the class she has an ambitious plan for this epic opportunity.u003cbru003eu003c/bru003eu003cbru003eu003c/bru003eBut Class 507 quickly learns that school without a teacher isn't easy, working together is nearly impossible, and keeping a secret is harder than they ever imagined. Maybe even harder than fractions. u003cbru003eu003c/bru003eu003cbru003eu003c/bru003eCan they keep the principal, the rest of the students, and their parents from finding out ... or will the greatest school year ever turn into the worst disaster in school history?