All summer long, Jeff and Matt have waited to head who their fifth-grade teacher will be. Then the letter arrives: Mr. Manlin, Room 512. Oh, no! Not Mr. Manlin! Everyone knows that he's the strictest, meanest teacher in the whole school. But when Mr. Manlin suddenly disappears and is replaced by a string of unsuspecting substitute teachers, Jeff and his friends can't believe their luck. Until Ms. Wilder shows up, that is! She makes class with Mr. Manlin look like a day at a