Peter Leroy recalls an episode from his grade-school years, an episode that he would really rather forget, one of the dark, gritty bits that one finds at the bottom of the chowder bowl of life. It involves the Young Tars, an organization originally intended to raise the morale of students at the new Babbington Central Upper Elementary School, and the treacherous Mr. Summers, a teacher whose armamentarium of instructional techniques featured "humility...