Frank J. Tipler is a professor of mathematics and physics at Tulane University and author of The Physics of Christianity and The Physics of Immortality, which argues that basic Christian miracle stories such as the Resurrection and the Virgin Birth can be consistent with the known scientific laws of the universe.

Salma Abugideiri is advisory board member and director of training of the Peaceful Families Project and a licensed professional counselor in private practice in Sterling, Virginia. She is the co-author of What Islam Says About Domestic Violence: A Guide for Helping Muslim Families.

Rachel Lev is the author of Shine the Light: Sexual Abuse and Healing in the Jewish Community (Northeastern University Press, 2002).

The HomeSchool Association of California publishes a newspaper and offers legislative and legal advocacy.

The Christian Home Educators Association of California is based in Norwalk, Calif.

The Texas Home School Coalition, a Christian-oriented advocacy group based in Lubbock, sponsors an awareness campaign in April.

Arizona Families for Home Education is a Christian-oriented advocacy group based in Chandler, Ariz.

Patrick Henry College in Purcellville, Va., was opened in 2000 by the Home School Legal Defense Association to provide higher education for Christian homeschooled students.

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.