art of problem solving

Wen told me there are many kids here who are very good at math even though the math ability of the general population may not be so good.  She said it is not surprising at all that the US team got the championship in this year's Olympic math competition held in Thailand.  One way to train children in math is to start with a book called 'Art of Problem Solving'.  The set of books introduces ways to solve math problems and is worth buying.