There’s an old expression in show business that advises entertainers not to work with children or animals because they’ll upstage them every time. But, while that’s often true, it’s not always the case, as seen in the latest feature offering from director Peter Cattaneo. This charming comedy-drama tells the fact-based story of English teacher Tom Michell (Steve Coogan), who somewhat begrudgingly takes an instructor’s job at St. George’s College, a prestigious boarding school in Buenos Aires, just before the 1976 Argentine revolution. The cynical, curmudgeonly teacher has moved around a lot, and...