Pittsburgh will close public schools for three days in late April because the NFL draft is coming to town, potentially causing traffic problems. Students will be "learning at home," which means that most will not be learning. Only one of the district's 54 schools is in the city core, close to the event, writes Salena Zito in the Washington Examiner . One-third of Pittsburgh's public school students are chronic absentees. The implicit message of the three-day closure -- if