How Humans Learn to Think Mathematically

My book explaining my overall framework to explain and predict how humans learn to think mathematically is slated for publication by Cambridge University Press (USA) on June 30 2013. I have been allowed by the publishers to place the first chapter of the book in draft form here. The book can be ordered in advance on the web at £24 paperback, £60 hardback. The best deal I have found is £18 including post and package worldwide from The Book Depository.