Ducksters
Ducksters: Maya Civilization for Kids: Religion and Mythology
This site can help students learn about the religion, gods, and mythology of the Maya civilization including Itzamna, Chaac, and Kukulcan.
Encyclopedia Mythica
Encyclopedia Mythica: Itzamna
This site from the Encyclopedia Mythica gives a rather brief biography of Itzamna. The site speaks of how he became the founder of the Mayan Culture.