Teaching English, Political Science, Economics, History, Social Sciences, Women's Studies, Religious Studies, Justice, Social Sciences? How about free books, video and audio content for your class?
http://america.gov has content you and your students can use. Check out the whole website - or just visit their publications page to find materials to supplement your teaching:
http://www.america.gov/publications.html. Click on the image to the right for a free copy of the book
"Being Muslim in America."