@article{discovery1541156, note = {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.}, month = {September}, pages = {187--188}, journal = {Research in Mathematics Education}, volume = {11}, year = {2009}, title = {Dynamic geometry software: the teacher's role in facilitating instrumental genesis}, number = {2}, issn = {1754-0178}, url = {http://dx.doi.org/10.1080/14794800903063398}, author = {Bretscher, N} }