THE brainy English teacher who became the central figure in the quiz-show scandals of the late 1950s has broken his silence. Charles Van Doren, 82, is finally telling his side of the story in a first-person account published in this week's New Yorker magazine, which came out yesterday. Van Doren - who lives in Connecticut with his wife of 50 years and still teaches college-level English (most recently at the University of Connecticut in Torrington) - said he decided to go public with his version of the "Twenty-One" quiz-show story for the sake of his grandchildren. The New Yorker story...