UNDATED (WTVB) -Teachers are in demand again.  The government says this past summer was the best hiring season for teachers in six years.  School districts across the country added 79-thousand jobs between July and September.  That reverses a concerning trend.  During the past four years, enrollment in public schools grew by an estimated 377-thousand students.  Schools should have hired about 62-thousand teachers and other workers to keep up, but instead they cut more than 315-thousand jobs.