DOCUMENT RESUME

A description is given of a 3-year research and development project designed to address the fundamental problems of preparing elementary teachers to teach mathematics for understanding. The use of a new technology is proposed. Hypermedia combines elements of multimedia rnvironments for learning and teaching with a recent development in computer software called "hypertext, " a representation of multipl c. ant flexible links between discrete pieces of data that allows users to navigate along multiple paths through a network of chunks of information and to build and store their own links. A hypermedia tool can make it possible to access and link video representations of a year's worth of teaching and learning in two mathematics classrooms from teachers ' and st.?.nts ' perspectives. It will include video and textual representations of teachers ' thinking about both the mathematical content and the pedagogical decision