id: 06434206
dt: a
an: 2015c.00704
au: Kaur, Harpreet; Sinclair, Nathalie
ti: Young children’s thinking about various types of triangles in a dynamic
geometry environment.
so: Oesterle, Susan (ed.) et al., Proceedings of the 38th conference of the
International Group for the Psychology of Mathematics Education
“Mathematics education at the edge", PME 38 held jointly with the
36th conference of PME-NA, Vancouver, Canada, July 15‒20, 2014, Vol.
3. [s. l.]: International Group for the Psychology of Mathematics
Education (ISBN 978-0-86491-360-9/set; 978-0-86491-363-0/v.3). 409-416
(2014).
py: 2014
pu: [s. l.]: International Group for the Psychology of Mathematics Education
la: EN
cc: G42 U72 C72
ut: types of triangles; dynamic geometry environment; geometric thinking;
interactions
ci: ME 2011d.00346
li:
ab: Summary: Preliminary results of longitudinal study on the development of
children’s geometric thinking in dynamic geometry environments. Here
we investigate young children’s (age 7‒8, grade 2/3) interactions,
in a whole classroom setting with an interactive whiteboard, with
sketchpad-based tasks involving the use of different types of
constructed triangles (scalene, isosceles, equilateral). We use {\it A.
Sfard}’s [Thinking as communicating. Human development, the growth of
discourses, and mathematizing. Cambridge: Cambridge University Press
(2008; ME 2011d.00346)] discursive approach to show how the children
developed a reified discourse on these different types of triangles and
how they described the behaviour of these triangles in terms of their
invariances (side lengths and angles).
rv: