Economics and public policy professor Charles Wheelan says commencement speeches need a reality check. In his new book 10 ½ Things No Commencement Speaker Has Ever Said, he fleshes out what he thinks new grads need to hear... like "Some of your worst days lie ahead"... and "Don't try to be great". Listen to his interview with Jian and tell us what you think. Do commencement speeches need to change? Do you agree with Wheelan's new lessons? What would you impart in a commencement speech to the class of 2012?