If you’re curious about how Chicago neighborhoods evolved, maybe it’s time for a history lesson. Stop by Harris Bank Auditorium, 111 W Monroe St, on May 20 at 1 p.m. for the Chicago Metro History Fair. The fair, which challenges students in grades 6-12 to research a piece of Chicago history, will include mini-museum exhibits, performances, documentaries and research paper presentations. Think history is but a thing of the past? Topics include “Who Decides? Planning Chicago After the Fire,” “How Should Public Housing Look? The Fight for Integrated Housing” and “Expanding the Boundaries: Integration in the Suburbs.” Aside from the fire, the topics seem spot-on for current housing debates.