College students said they spent slightly less on textbooks and other course materials last year, compared with 2009, and almost $50 less than five years ago, according to survey results released on Tuesday by the National Association of College Stores. When they were surveyed in the fall of 2011, students estimated that they spent $655 on course materials that year, less than the $667 they said they spent in 2009 and the $702 they spent in 2007, according to the association. The group credited the drop to college bookstores' efforts to help students save money, such as by offering ...