Dr. Susan Wagner - an expert in School Physical Education - joins us in the podcast today.  We talk extensively about the need for activity for kids, why school systems are abolishing PE and recess, and how these actions could be jeopardizing not only the kids' health but also their academic progress.  (Yes, students actually do better on tests when they're active.  Easiest way for schools to boost performance on academic tests - make sure that recess and PE are in the curriculum.  Are a...