That line in a speech during the annual Education Minnesota conference last week put Megan Olivia Hall, the state’s teacher of the year, in the line of fire. Hall, a grade 7-12 science teacher at Open World Learning Community in St. Paul said: I think about all of the teachers in the St. Paul Public Schools who gave up our cost of living raise in 2010 in an effort to limit class size in our district. Teachers are persistent and responsible and generous because we believe every child in America, regardless of circumstances of birth, deserves a decent chance at...