This brief has a twofold motivation. One is to present an organization, Washington Teachers of Teachers of Mathematics (WaToToM), that has become a solid player in the arena of mathematics education i
?This is an introduction to a Didactique, research program that has been going on in France since the '70s and whose importance is now widely recognized, but whose content is still not easy access to
This work presents one of the original and fundamental experiments of Didactique, a research program whose underlying tenet is that Mathematics Education research should be solidly based on scientific
