Kathleen V. Hoover-Dempsey is an associate professor of psychology and human development at Vanderbilt University in Nashville. She  is co-author (with Christa L. Green) of  the 2007 study “Why Do Parents Homeschool? A Systematic Examination of Parental Involvement.”

Michael L. Coulter is a professor of humanities and political science at Grove City College in Grove City, Pa. He is the author of “Home School Legal Defense Association” in the Encyclopedia of American Religion and Politics.

Dayna Martin is the author of Radical Unschooling: A Revolution Has Begun (2009). She is the public face for UnschoolingAmerica.com, which is based in Madison, N.H.

The National Home Education Research Institute in Salem, Ore., publishes a journal, the Home School Researcher.

Ann Zeise runs A to Z Home’s Cool, a large resource site for homeschoolers that is based in Milpitas, Calif.

Brian D. Ray is founder and president of the nonprofit National Home Education Research Institute in Salem, Ore.

Robert Kunzman is an associate professor at Indiana University (Bloomington) School of Education. He posts the Homeschooling Research & Scholarship Web site. He is the author of Write These Laws on Your Children: Inside the World of Conservative Christian Homeschooling (2009).

Milton Gaither is associate professor of education at Messiah College, a Christian liberal arts college in Grantham, Pa. He is the author of Homeschool: An American History (2008).

Bruce S. Cooper is a professor in the Graduate School of Education at the Lincoln Center campus of Fordham University in Manhattan. He edited Homeschooling in Full View: A Reader.