%V 11 %P 187-188 %D 2009 %N 2 %T Dynamic geometry software: the teacher's role in facilitating instrumental genesis %L discovery1541156 %J Research in Mathematics Education %A N Bretscher %O This is an Accepted Manuscript of an article published by Taylor & Francis in the Research in Mathematics Education on 22 July 2009, available online: http://www.tandfonline.com/10.1080/14794800903063398.