One mathematical origin vs. two phenomenological origins: the meaning of the movement of objects with respect to the point $(0,0)$. (Un origen matemático vs. dos orígenes fenomenológicos: la significación del movimiento de objetos respecto del punto $(0,0)$.) (Spanish. English summary)

REDIMAT, J. Res. Math. Educ. 2, No. 2, 183-208, electronic only (2013).

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Becoming aware of mathematical gaps in new curricular materials: a resource-based analysis of teaching practice. (English)

Math. Enthus. 10, No. 1-2, 163-190 (2013).

2

Arithmetical procedures in the solution of a problem involving velocity. (English)

Novotná, Jarmila (ed.) et al., Mathematics in the centre. Proceedings of the 30th annual conference of the International Group for the Psychology of Mathematics Education, PME, Prague, Czech Republic, July 16‒21, 2006. Vol. 1-5. Prague: Charles University, Faculty of Education. Part 5, 313-320 (2006).

3

Five steps to zero: students developing elementary number theory concepts when using calculators. (English)

Masalski, William J. et al., Technology-supported mathematics learning environments. Sixty-seventh yearbook. Reston, VA: National Council of Teachers of Mathematics (NCTM), (ISBN 0-87353-569-3). 35-50 (2005).

4

The sensual and the conceptual: Artefact-mediated kinesthetic actions and semiotic activity. (English)

Johnsen Høines, Marit (ed.) et al., Proceedings of the 28th international conference of the International Group for the Psychology of Mathematics Education, PME 28, Bergen, Norway, July 14‒18, 2004. Bergen: Bergen University College. Part IV, 73-80 (2004).

5

Calculators, graphs, gestures and the production of meaning. (English)

Pateman, Neil A. et al., Proceedings of the 27th Conference of the International Group for the Psychology of Mathematics Education held jointly with the 25th Conference of PME-NA. Vol. 4. ,. 55-62 (2003).

6

A theoretical model of analysis of rate problems in algebra. (English)

Pateman, Neil A. et al., Proceedings of the 27th Conference of the International Group for the Psychology of Mathematics Education held jointly with the 25th Conference of PME-NA. Vol. 3. ,. 9-16 (2003).

7

The spontaneous emergence of elementary number-theoretic concepts and techniques in interaction with computing technology. (English)

Pateman, Neil A. et al., Proceedings of the 27th Conference of the International Group for the Psychology of Mathematics Education held jointly with the 25th Conference of PME-NA. Vol. 3. ,. 141-148 (2003).

8

The multi-line-screen calculator and the emergence of numerical strategies in secondary 1, 2, and 3 students. (English)

van denHeuvel-Panhuizen, Marja, Proceedings of the 25th conference of the international Group for the Psychology of Mathematics Education. Vol. 1. , (ISBN 90-74684-16-5). 312 (2001).

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