*Söbbeke, E. & Steinbring, H. (2009). Visualisations as Examples of Employing Students' Powers to Generalize. In: Lerman, S. & Davis, B. (Eds). Mathematical Action & Structures Of Noticing – Studies on John Mason's Contribution to Mathematics Education. Rotterdam, The Netherlands: Sense Publishers. 75 – 83. | *Söbbeke, E. & Steinbring, H. (2009). Visualisations as Examples of Employing Students' Powers to Generalize. In: Lerman, S. & Davis, B. (Eds). Mathematical Action & Structures Of Noticing – Studies on John Mason's Contribution to Mathematics Education. Rotterdam, The Netherlands: Sense Publishers. 75 – 83. |