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Download full textAntonini, Samuele – International Group for the Psychology of Mathematics Education, 2004
The equivalence between a statement and its contrapositive is so obvious for an expert that, usually, he does not need any explanation. In this paper, we shall examine the argumentations which students produce in order to justify a statement that, in their opinion, is equivalent to a given statement. We shall observe that the most common…
Descriptors: High School Students, Grade 10, Secondary School Mathematics, Persuasive Discourse
Cerulli, Michele; Mariotti, Maria Alessandra – International Group for the Psychology of Mathematics Education, 2003
In the framework of a long term teaching experiment we present an Educational approach based on the use of a dynamic geometry software and a symbolic manipulator. Here we present the general ideas of the followed approach focusing on how meanings can originate from phenomenological experience and evolve under the guidance of the teacher. In…
Descriptors: Geometry, Teaching Methods, Experiments, Grade 9
