"Are You Smarter Than a 5th Grader?" 8 p.m. KMPH (Channel 26): The prime-time game show's scheduling celebrity contestants has pushed into the area that hurt the ratings of "Who Wants to be a Millionaire?" Its more exciting to see an average person win money than to see a celebrity pick up some dough for a favorite charity. "Lois and Clark: The New Adventures of Superman" star Dean Cain fields the elementary school questions tonight so look for a lot of Man of Steel jokes from host Jeff Foxworthy. Although the game show is not as exciting with the celebrity players, it is still fun to watch adults struggle with topics they studied many years ago.