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Hoyos, Veronica – International Group for the Psychology of Mathematics Education, 2003
A case study is presented on what is learned by a very advanced Math student in a ninth grade class (fifteen years old, approximately). This case was obtained from an exploratory study carried out in a classroom of eighteen students when the employment of certain cultural artifacts was introduced to approach the theme of basic geometrical…
Descriptors: Grade 9, Geometric Concepts, Geometry, Case Studies
Kieran, Carolyn; Guzman, Jose – International Group for the Psychology of Mathematics Education, 2003
We present in this paper five case studies of instrumental genesis of number-theoretic concepts and techniques involving multiples, divisors, and numerical decomposition. The pupils, who were 12 to 15 years old, used the multi-line screen display of the graphing calculator to explore numerical tasks related to the "Five steps to zero"…
Descriptors: Task Analysis, Graphing Calculators, Mathematics Instruction, Case Studies