| |
International Journal of Computers for Mathematical Learning, Vol. 1, No. 1., pp. 95-123.
|
| |
In Learning and Teaching Mathematics: An International Perspective (1997), pp. 133-158.
|
| |
In The Nature and Role of Algebra in the K-14 Curriculum: Proceedings of a National Symposium, 17-22 (1998), pp. 17-22.
|
| |
In Handbook of Interantional Research in Mathematics Education (2002), pp. 757-786.
|
| |
In Second Early Algebra Meeting (1998)
|
| |
the 25th conference of the International Group for the PME, Vol. 1 (2001), pp. 130-140.
|
| |
|
| |
|
| |
|
| |
|
| |
Journal of Mathematical Behavior, Vol. 4 (1985), pp. 195-208.
|
| |
The American Mathematical Monthly, Vol. 74, No. 1. (1967), pp. 38-55.
|
| |
In CAME 2005 - The Fourth CAME Symposium (forthcoming)
|
| |
the International Journal for Technology in Mathematics Education (in press)
|
| |
In Proceedings of the 18th International Conference for the Psychology of Mathematics Education (PME), Vol. II (1994), pp. 240-247.
|
| |
Educational Studies in Mathematics, Vol. 12 (1981), pp. 317-326.
|
| |
Mathematical Thinking and Learning, Vol. 3, No. 4. (2001), pp. 221-259.
|
| |
In International Handbook of Mathematics Education (1996)
|
| |
In Approaches to Algebra: Perspectives for Research and Teaching (1996), pp. 65-86.
|
| |
In Pattern in the Teaching and Learning of Mathematics (1999)
|
| |
Educational Studies in Mathematics, Vol. 49 (2002), pp. 379-402.
|
| |
Educational Studies in Mathematics, Vol. 26, No. 2-3. (1994), pp. 191-228.
|
| |
In 7th International Conference on Technology in Mathematics Teaching (2005)
|
| |
In CAME 2005 - The Fourth CAME Symposium (forthcoming)
|
| |
Mathematics Teaching in the Middle School, Vol. 2, No. 4. (1997), pp. 274-281.
|
| |
In Perspectives on School Algebra (2000)
|
| |
In PME 17, Vol. 1 (1993), pp. 138-145.
|
| |
Journal for Research in Mathematics Education, Vol. 23, No. 5. (1992), pp. 441-467.
|
| |
Educational Studies in Mathematics, Vol. 59, No. 1-3. (July 2005), pp. 85-112.
|