Preschool, kindergarten, elementary school, middle school, and secondary school teachers, except special education, held about 3.8 million jobs in 2004. Of the teachers in those jobs, about 1.5 million are elementary school teachers, 1.1 million are secondary school teachers, 628,000 are middle school teachers, 431,000 are preschool teachers, and 171,000 are kindergarten teachers. The majority work in local government educational services. About 10 percent work for private schools. Preschool teachers, except special education, are most often employed in child daycare services (61 percent), religious organizations (12 percent), local government educational services (9 percent), and private educational services (7 percent). Employment of teachers is geographically distributed much the same as the population.
Source: Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2006-07 Edition