The Encyclopedia of Mathematics Education is a comprehensive reference text, covering every topic in the field with entries ranging from short descriptions to much longer pieces where the topic warrants more elaboration. The entries provide access to theories and to research in the area and refer to the leading publications for further reading. Links will also be made to particular texts in Springer journals and e-books through SpringerReference.com. The Encyclopedia is aimed at graduate students, researchers, curriculum developers, policy makers, and others with interests in the field of...