When Kevin's chorus teacher Mr. Frace (William Lanteau) hands his class over to a student teacher Miss Haycock (Andrea Walters), the terrible voiced 8th grade glee club has to perform "Stout Hearted Men" in the "Spring Sing" concert. After Kevin and the rest of the class tells their eager teacher they don't want to sing in the recital, she starts crying but classmate Warren Butcher (Jeffrey Baum), who never talks begins singing in perfect pitch, now they have a secret weapon for the concert. Its just too bad his 13-year-old voice starts to change midway through the song. Guest Starring: Michael Tricario as Randy Mitchell, Dustin Diamond as Joey Lapman, and Troy Slaten as Eric.