Vol. 17 Num. 1 (1997) Barbara Brizuela Inventions and conventions: a story about capital numbers2 Celia Hoyles The curricular shaping of students' approaches to proof7 Gavin Hitchcock Teaching the negatives 1870-1970: a medley of models17 Luis Radford On psychology, historical epistemology, and the teaching of mathematics: towards a socio-cultural history of mathematics26 Rudolf Bkouche Epistémologie, histoire et enseignement de mathématiques34 Guillermina Waldegg Histoire, épistémologie et méthodologie dans la recherche en didactique43 Michael Otte Mathematics, semiotics, and the growth of social knowledge47 Fulvia Furinghetti History of mathematics, mathematics education, school practice: case studies linking different domains55 Victor J. Katz Some ideas on the use of history in the teaching of mathematics62