These proceedings contain 4 keynote addresses and 88 papers concerning the theme of the conference: Contexts in Mathematics Education. The four keynote addresses are: (1) "Contemplating Cultural Context" (Bill Barton); (2) "Conceptualising Cultural and Social Contexts in Mathematics Education" (Alan Bishop); (3) "Mathematical Learning in the Social Context" (George Booker); and (4) "Childrens' Construction of Mathematical Ideas" (Carolyn Maher). The 88 contributed papers deal with mathematical content ranging from prenumber to calculus, learners ranging from preschool to adult, teachers, technology, affect, assessment, metacognition, psycholinguistics, and a wide variety of social issues. (MDH)