Today's program featured a caller who had questions about a variety of aspects of the CPS model, including: How does working on unsolved problems teach lagging skills? What do we do about the other 28 kids in a classroom when a challenging student is shutting down/acting out? How can we justify spending that much time with one student? How can we justify giving one student exemptions for assignments or making concessions for disruptions when we need to set a precident for other students? Answers, of course, were also provided! But you'll have to listen to the program to hear the answers and find out how the theme for the day -- landfill -- are related.