"America’s K-12 public education system has experienced tremendous historical growth in employment, according to the U.S. Department of Education’s National Center for Education Statistics. Between fiscal year (FY) 1950 and FY 2009, the number of K-12 public school students in the United States increased by 96 percent while the number of full-time equivalent (FTE) school employees grew 386 percent. Public schools grew staffing at a rate four times faster than the increase in students over that time period. Of those personnel, teachers’ numbers increased 252 percent while administrators and other staff experienced growth of 702 percent, more than seven times the increase in students."

Read more.