Students should be assigned (or chose) a world religion. This sheet guides their research and asks them to identify everything from the region's origin to it's holidays to it fundamental beliefs.
This activity allows students to do some research, but also to collaborate with their peers. You could have the students meet in small groups after they finish their research and compare and contrast the religions that they learned about. To take if further, you could have the students look for fundamental disagreements and locate real world problems stemming from the basis of their religion.
Fun and interactive!