OK, you’ve set up your dorm room, bought your books and figured out where the library is. What next? Two experts explain to freshmen how to get the most out of college and not waste their time or their parents’ money. In a guest column, the head of a teacher’s organization discusses the importance of ethics training in the wake of the Atlanta cheating scandal. Readers sound off on new brain research confirming that teens are driven to take risks and are more apt to do so when peers are watching.