After a week off because of the September 15 windstorm, Jefferson County Public Schools students head back to class today.The hurricane force winds knocked out power to more than 100 schools, forcing JCPS officials to cancel classes district-wide.Superintendent Dr. Sheldon Berman says all buses will be running."I would encourage parents of students who are walkers to be careful, there are still lines down, there are still trees in the road, and walkways. And if you can, either walk your child to school or be with your child so that they are safe," Berman said.Berman says the missed days will be tacked on to the end of the school calendar.