Carol Topp, author of Homeschool Co-ops: How to Start Them, Run Them and Not Burn Out (2008), blogs about the issues of running a co-op and offers workshops and other resources to parents interested in homeschooling children. Topp is a CPA who works out of her home office in Cincinnati.

Roblyn Honeysucker coordinates the Baton Rouge Homeschool Association, which is listed along with other Louisiana homeschool organizations posted by Practical Homeschooling Magazine. The BRHA describes itself as “a secular and inclusive homeschool support group serving the Baton Rouge, LA area and surrounding parishes.”

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).