I am a huge fan of geography and love authentic projects that teach geography. I was involved in an extremely successful project where each child picked a state in the United States to study. Actually, they had to write a letter to the classroom teacher persuading the teacher to let them study the state they were interested in. To do this they were already researching states for material for their persuasive letters (reading/writing).
The students then spent the entire school year learning about their state. We tied the state research into reading, writing, and math. (I’ll post individual blogs with ideas on how to do this – way too much for one blog!) At the end of the year we presented what they had learned in a State Fair.