Using spatial ratios to teach numerical fraction and ratio concepts. Poster to be presented at the meetings of the American Educational Research Association, Seattle, April 2001. A prospective developmental perspective on early mathematics instruction. Shape perception and the early development of ratio knowledge. A picture is worth more than two lines.
Young children match spatial proportions.
Presented at the 1999 meetings of the Society for Research in Child Development. Presented at the 1999 meetings of the Society for Research in Child Development. The case of spatial proportions. Presented to the Cognitive Science Society of Ireland, Dublin. Goals and numerical development.