This site has different articles that discuss activities teachers can do with their students to educate them about different major religious holidays from various traditions. Such activities involve storytelling and craft making.
It also contains lesson plans for teachers to teach about the importance of giving and about major religious holidays. These lesson plans discuss the holidays of Diwali, Kwanzaa, Ramadan, Hanukkah, Christmas, and La Posada and the different ways they are celebrated.