Learn Alberta Tutorial on interpreting Political Cartoons:
http://www.learnalberta.ca/content/t4tes/courses/senior/ss30_1/mm/tk/ss30_1_tk_001/ss30_1_tk_001.htm
http://www.learnalberta.ca/content/t4tes/courses/senior/ss30_1/mm/tk/ss30_1_tk_001/ss30_1_tk_001.htm