1 Enheden for didaktik vedr. Naturfagene og Matematik, Danish School of Education, Aarhus University, Aarhus University2 Department of Curriculum Research, Danish School of Education, Aarhus University, Aarhus University
the conceptual tool 'flexibility'
Montana Math Enthusiast, 2007, Vol 4, Issue 2, p. 230-250
Flexibility of mathematical conceptions; conceptual tool; boundary object; theory and practice in math. ed.; computers for the learning of mathematics