US National Center for Education Statistics Reports:
A. “Homeschooling in the United States: 2012,” by Jeremy Redford, Danielle Battle, and Stacey Bielick (NCES 2016096, November 2016, .pdf format, 52p.).
B. “Characteristics of Private Schools in the United States: Results From the 2013-14 Private School Universe Survey,” by Stephen Broughman and Nancy Swaim (NCES 2016243, November 2016, .pdf format, 57p.).
C. “The Nation’s Report Card: 2015 Science at Grades 4, 8 and 12,” (NCES 2016162, October 2016, .pdf format, p.).