A simple way to improve public schools might be: make sure the teachers aren't playing hooky. ABC News says a new report shows one out of every 6 public school teachers misses more than three weeks of class. If a teacher skips class - the quality of education suffers. That's the essence of this report by the nonprofit National Council on Teacher Quality - which looked at data from 40 public school districts across the country and found 16 percent of teachers are, what the report calls, "chronically absent." That means they missed at least 18 days of school each year. But on average, the same report said public school teachers had an attendance rate of 94 percent, which the American Federation of Teachers says shows "extraordinary" dedication.