Livro didático de Física e de Ciências: contribui？？es das pesquisas para a transforma？？o do ensino

this paper systematizes the results of research on physics and science textbooks developed by the group of studies and research on physics teaching (utfpr) and the research group on didactical publications (ufpr). it highlights the absence of didactic and epistemological studies on this subject and evaluates the results obtained in different projects, in regard to both students' books and teachers' manuals. the work presents results which indicate the need to expand research on this matter.