| Margot Berger - Vol. 18 Num. 2 (1998) | ||
| Graphic calculators: an interpretive framework | 13-20 | |
| Margot Berger - Vol. 24 Num. 2 (2004) | ||
| Heaps, complexes and concepts (part I) | 2-6 | |
| Margot Berger - Vol. 24 Num. 3 (2004) | ||
| Heaps, complexes and concepts (part 2) | 11-17 | |
for the learning of mathematics
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