Wu on teachers and mathematics educators
In March of 2008, I was passing through London’s Heathrow Airport and happened to catch sight of an ad by IBM: “Stop selling what you have. Start selling what they need.”
If we let “they” be our math teachers and math education professors, then this would be a pointed directive on what mathematicians need to do for school mathematics education: Get to know what they need, and teach it.
What i think he is saying
Mathematicians are the only ones capable of solving problems of teaching and learning mathematics. As such, they are duty bound to teach their colleagues involved in K-12 teaching and anyone who does not do original research in mathematics.