Development of angle concepts by progressive abstraction and generalisation Michael C. MitchelmorePaul White OriginalPaper Pages: 209 - 238
La parabole du gaucher et de la casserole à bec verseur: ètude des processus d'apprentissage dans un environnement de calculatrices symboliques Luc Trouche OriginalPaper Pages: 239 - 264
Building a versatile understanding of algebraic variables with a graphic calculator Alan T. GrahamMichael O.J. Thomas OriginalPaper Pages: 265 - 282
Collaborative action research on the learning and teaching of algebra: a story of one mathematics teacher's development Anne M. RaymondMarylin Leinenbach OriginalPaper Pages: 283 - 307