This Issue Brief provides estimates of the number and percentage of homeschooled students in the United States in 2007 and compares these estimates to those from 1999 and 2003. In addition, parents’ reasons for homeschooling their children in 2007 are described and compared to 2003. This report provides statistics about the homeschooling population during the spring of 2003 and spring of 1999, and provides detailed characteristics of homeschoolers in both years. The results show that in 2003 there were 1,096,000 students being homeschooled, a figure that represents a 29 percent increase from the estimated 850,000 students who were being homeschooled in the spring of 1999.