id: 05239951
dt: a
an: 2008b.00395
au: Falcade, Rossana; Mariotti, Maria Alessandra; Laborde, Colette
ti: Towards a definition of function.
so: Johnsen Høines, Marit (ed.) et al., Proceedings of the 28th international
conference of the International Group for the Psychology of Mathematics
Education, PME 28, Bergen, Norway, July 14‒18, 2004. Bergen: Bergen
University College. Part II, 367-374 (2004).
py: 2004
pu: Bergen: Bergen University College
la: EN
cc: I23 D43 C73 U73 R23 A63
ut: function; approach; concept formation; geometry software; educational
technology; semiotics; mathematical concepts; teacher role; computers
in mathematics classroom ; lower secondary
ci:
li: emis:proceedings/PME28/RR/RR246_Falcade.pdf
ab: Summary: This paper points up, in the case of a particular class
discussion, the crucial role that the Trace tool could play as
potential semiotic mediator for the notion of function. In particular,
the episode we are presenting here want to show how the idea of
trajectory developed through a specific sequence of activities, carried
out in Cabri and centered on the use of this tool can substantially
contribute to building the meaning of function as a point by point
correspondence. It also shows the conceptual difficulties attached to a
complete construction of this meaning and how the role of the teacher
is based on and complements the pragmatic experience of the students in
Cabri.
rv: