We like to believe that the people in charge of our public schools – administrators and labor leaders – care about students and what’s happening in their community. In Chicago, what’s happening in the community is not good. The city has been plagued in recent years with a frightening increase in shootings, including many incidents that involve school-aged children. Somehow Karen Lewis, the president of the Chicago Teachers Union, finds that funny. Lewis appeared at the recent conference of Labor Notes, which bills itself as a “Troublemakers Union.” It’s essentially a Big Labor agitators’ convention, and there’s no more appropriate...