This morning on Eight Forty-Eight we’ll first explore the history and curriculum of the International Baccalaureate program that Mayor Emanuel seeks to expand in order to entice middle-class families to enroll their children in Chicago schools. Next up, Chicago “joke-wrangler” Len Austrevich joins us live from a 30-hour Laugh-a-thon that began Tuesday afternoon at the Laugh Factory. WBEZ food blogger Louisa Chu and Vice President of Greater Midwest Foodways Alliance Catherine Lambrecht will join us in-studio to talk about this weekend’s “Roadfood: Exploring the Midwest One Bite at a Time” symposium. And musician Ezra Furman will be playing throughout the hour.