Professor of sociomedical sciences at the Mailman School of Public Health at Columbia University in New York.

A sociology professor at the University of Massachusetts, Amherst. She is the author of Talk About Sex: The Battles Over Sex Education in the United States.

Nancy Faust Sizer is a teaching a course on school reform at the Harvard Institute for Learning in Retirement. She was an adjunct lecturer on education at the Harvard Graduate School of Education. She co-wrote The Students Are Watching: Schools and the Moral Contract.

Assistant pastor at Riverside Chapel Seventh-day Adventist Church in Nashville, Tenn., which collaborated with several other local Adventist churches on a recent “purity ball.”

An associate professor and program director of public health at Western Kentucky University. He is an expert on teen issues, including sex education.

A professor of anthropology at Radford University in Radford, Va. She wrote God’s Schools: Choice and Compromise in American Society.

Director of the Center on Children, Families and the Law and a psychology professor at the University of Nebraska. He reported on research findings that deal with both abstinence-only and comprehensive sex education.

A psychology professor at DePaul University in Chicago. She is an expert on teen pregnancy and adolescent violence. She has conducted a large study on the effectiveness of school-based health clinics.

An associate professor of history at the University of Kansas at Lawrence and author of Teaching Sex: The Shaping of Adolescence in the 20th Century.