%0 Journal Article %T Desarrollo del conocimiento para la ense£¿anza de la proporcionalidad en futuros profesores de primaria %A Rivas %A Mauro A. %A Godino %A Juan D. %A Castro %A Walter F. %J Bolema: Boletim de Educa£¿£¿o Matem¨¢tica %D 2012 %I Universidade Estadual Paulista %R 10.1590/S0103-636X2012000200008 %X this paper describes some outcomes of an educational process in a teacher mathematics education context. the main objective of the education process is to develop the mathematical knowledge necessary to teach at the elementary grade-level. this process involves: (a) the proportionality problem resolution, (b) analysis of the problem resolution using an epistemic analysis tool, and (c) prospective assessment of three types of sixth graders' responses to a proportionality problem. the results point out that the formative process fosters the development of mathematical knowledge for teaching. finally, some implications for prospective teacher education are discussed. %K teacher education %K proportional reasoning %K epistemic analysis %K teacher knowledge. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-636X2012000200008&lng=en&nrm=iso&tlng=en