Un registre géométrique unidimensionnel pour l’expression des rationnels

Abstract Geometric representation of rational numbers are usually considered to be simply illustrations facilitating the comprehension of the true objectives: learning the meaning of fractional and decimal expressions, constructed from the effect these have on magnitudes familiar to the learners and making simple calculations using these expressions. Nevertheless, certain obstacles often arise in such a … Lire la suite

La dé-transposition de connaissances scolaires

Abstract The first part presents surprising results drawn from an experimental study about the use of some forms of reasoning; this study brings into light some clumsiness, sometimes even « errors » both among teachers and students of mathematics. In a second part, we consider those facts in the light of theoretical and experimental results … Lire la suite