STENDAL, Germany, July 14 - A woodwork teacher in the eastern German state of Saxony-Anhalt has triggered a dispute over political expression in the classroom ahead of a regional election in two months that could produce radical changes in schools if the far-right AfD wins.To the AfD, whose nationalist, anti-immigrant platform has made it a formidable political force, the question is one of fairness and proper educational practice. To its critics, it is about silencing legitimate discussion of a party whose programme, they say, would undo safeguards against a revival of Germany's extremist past.Max Heckel, who teaches craft and technical...