What Do Orthodox Jews Wear on Their Foreheads? | People - Opposing Views
by Brett Levine
Informative short article explaining Tefillin, Yarmulke (aka kippa), the variety of hats, and the Tallit, as worn by men in Orthodox Judaism.
Other articles on this subject include:
"Kippot, Hats and Head Coverings: A Traditionalist View", by Rabbi Adin Steinsaltz, in MyJewishLearning.com
"Headcoverings in Judaism", at BJE.org.au
and a news article in the Times of Israel: "Oversight body pans Bar_Ilan U. for penalizing bare-headed student", by Aaron Kalman, from December of 2012. Just an observation story for thought.