@inbook {MATHEDUC.02342767,
author = {Speiser, Robert and Walter, Charles N. and Maher, Carolyn A.},
title = {Representing change.},
year = {2001},
booktitle = {Proceedings of the 25th conference of the International Group for the Psychology of Mathematics Education. Vol. 4},
isbn = {90-74684-16-5},
pages = {209-216},
publisher = {,},
abstract = {We report on data from a summer institute for high-school students, part of a 13-year longitudinal study of the development of mathematical ideas. The students were invited to discuss the motion of a cat, given 24 time-lapse photographs taken in less than a second. As students explain, justify, and convince others, a re-examination of previous explorations, including prior reasoning, is often triggered. The student data are analyzed through detailed examination of how students work with a variety of representations in order to build arguments, through extended social interaction. (orig.)},
msc2010 = {C33xx},
identifier = {2001f.04486},
}