Does your son have access to a math mentor? Someone who loves math? For me it was never about an hour of extra problem solving. My love of math was encouraged by my mathematical mentor, my father. It was all about
-reading his Scientific American and talking about the articles, especially the puzzles and math
-dad teaching me Fortran so I could explore rates of converging series and then smuggling the punch cards into the computer center at a time when children didn't get access
-the puzzles and problems he wrote on church bulletins so I wouldn�t wiggle during the sermon
In other words, it was all about the small, daily interactions that fostered my interests. I realize that many parents are at a loss because math is not an interest of theirs, but maybe you could find a mentor for your son who can suggest some projects or ideas for exploration.
