U.S. school principals 2007/08, by years of teaching experience and school type
This statistic shows the distribution of school principals in public and private schools in the United States, according to the number of years teaching experience they had prior to becoming a principal as of the 2007/08 academic year. At this time, 17.2 percent of principals at all schools had 20 years experience or more as a teacher before being promoted to principal.