Read an essay by Michael Kress, editor in chief of MyJewishLearning.com, about the factions and tensions within the Orthodox movement.

The Berman Jewish DataBank has links to the National Jewish Population Study and several other studies, some of which provide different figures for the overall Jewish population.

Read the National Jewish Population Survey’s reports on geographic differences among Jews around America. The NJPS showed that although the Orthodox influence is felt nationally, Orthodox Jews are concentrated in urban Northeast areas to a greater degree than other Jews.

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

Richard Peace is a theology professor at Fuller Theological Seminary in Pasadena, Calif., and can discuss belief in miracles. He is the author of Contemplative Bible Reading: Experiencing God Through Scripture, which describes Lectio Divina from an evangelical perspective, and Spiritual Journaling: Recording Your Journey Toward God.

Daniel Stout is a professor of journalism and media studies at the University of Nevada, Las Vegas, and is co-editor of the Journal of Media and Religion. He can speak about miracles, including the Mormon perspective.

David K. Clark is vice president and dean at Bethel Seminary in St. Paul, Minn., and has written about miracles in world religions.

Richard Kieckhefer is chairman of the religion department at Northwestern University in Evanston, Ill., and can discuss the history of miracles, magic and sainthood.

Paul Plenge Parker is chairman of the theology department at Elmhurst College in Elmhurst, Ill., and has written about miracles and healing.