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ERIC Number: ED501095
Record Type: Non-Journal
Publication Date: 2003-Jul
Pages: 8
Abstractor: Author
Influential Aspects of Dynamic Geometry Activities in the Construction of Proofs
Sanchez, Ernesto; Sacristan, Ana Isabel
International Group for the Psychology of Mathematics Education, Paper presented at the 27th International Group for the Psychology of Mathematics Education Conference Held Jointly with the 25th PME-NA Conference (Honolulu, HI, Jul 13-18, 2003), v4 p111-118
We present results from a study which investigated the influence of dynamic geometry-based activities in the development of proving skills (in geometry) in high-school students (15-16 years of age). After a 12-week course on Cabri and the writing of conjectures and proofs, students were asked to write and prove conjectures based on their observations in six Cabri-based activities. We analyzed the written data in the light of Balacheff's work (1987, 1999). Although progress is shown on the level of the development of knowledge, in that the objects and their relationships become more meaningful, there are still many difficulties in decontextualizing the activities and in the development of a functional language, necessary for the passage from pragmatic to intellectual tools. (Contains 2 footnotes.) [For complete proceedings, see ED500860.]
International Group for the Psychology of Mathematics Education. 35 Aandwind Street, Kirstenhof, Cape Town, 7945, South Africa. Tel: +27-21-715-3559; Fax: +27-88-021-715-3559; e-mail:; Web site:
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A