The Calvin Institute of Christian Worship is an organization based in Grand Rapids, Mich., dedicated to promoting Christian scholarship. Its online resources include information about the practice of fixed-hour prayer and about disability within faith communities.

Melvin Konner is a professor of anthropology, human biology and Jewish studies at Emory University, and author of Unsettled: An Anthropology of the Jews, about the history of Jewish culture.

Ira Sheskin is a specialist in Jewish demographics at the University of Miami, where he is a fellow at the Sue and Leonard Miller Center for Contemporary Judaic Studies. Sheskin was a consultant on the NJPS study.

Karla Goldman is a historian in residence at the Jewish Women’s Archive in Brookline, Mass. She is an expert on how women have shaped American Judaism.

Rabbi Shmuley Boteach is an Orthodox rabbi from Englewood, N.J., who has become a nationally known figure through his writings and television appearances. Boteach (pronounced boh-TAY-ock) offers family and personal advice based in traditional Jewish wisdom. He hosts the Learning Channel program Shalom in the Home and became popular through his book Kosher Sex: A Recipe for Passion and […]

Eliezer Segal is a professor of religious studies at the University of Calgary. He has a Web page explaining the “Varieties of Orthodox Judaism.” The page sets out the many branches of the movement.

Norma Baumel Joseph is an associate professor of religion at Concordia University in Montreal. She writes about the experience of women in Orthodox Judaism.

David A. Harris is executive director of the American Jewish Committee, a nonpartisan organization that conducts an annual survey of American Jews.

Tamar Ross is a professor of Jewish philosophy at Bar-Ilan University in Ramat Gan, Israel. She writes about Orthodoxy and feminism.