What factors led to the decline and collapse of the Mayan Empire?

Reference article Discuss your final conclusions about the decline and collapse of the Mayan civilization .

Reference article Compare the Mayan society of their classical period with the Mayan society of the 20th century.

Reference article Discuss how the Mayan calendar is different from our own calendar.

Reference article Discuss how the Mayans wrote their history. Create one of their hierglyphics and tell what is means.

Reference article Compare a game the Mayans played to one of our own sports.

Reference article		Discuss your final conclusions about the decline and collapse of the Mayan civilization .
Reference article		Compare the Mayan society of their classical period with the Mayan society of the 20th century.
Reference article		Discuss how the Mayan calendar is different from our own calendar.
Reference article		Discuss how the Mayans wrote their history. Create one of their hierglyphics and tell what is means.
Reference article		Compare a game the Mayans played to one of our own sports.