Bobby listens intently at the dinner table as Dad and Mom voice one of their common interests ...their popularized political views.    They both have a fondness for their son's fourth grade teacher, whose main focus when they'd met for a teacher's meeting was not purely educational, but filled with accolades for this "Land of Opportunity", the United States of America.   But after the meal, thoughts and aspirations go their separate ways.   Dad picks up the Sports and Leisure section of the newspaper, while Mom thumbs through a fashion magazine.