How do teachers’ approaches to geometric work relate to geometry students’ learning difficulties 教师的几何作业方法与几何学生学习困难有何关系?.pdf
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Educ Stud Math (2011) 77:129– 147
DOI 10.1007/s10649-011-9304-7
How do teachers’ approaches to geometric work relate
to geometry students’ learning difficulties?
Alain Kuzniak Jean-Claude Rauscher
Published online: 1 March 2011
# Springer Science+Business Media B.V. 2011
Abstract Various studies suggest that French students (grades 7 to 10) may solve
geometric problems within a paradigmatic framework that differs from that assumed by
teachers, a situation prone to misunderstandings. In this paper, we study the extent to which
secondary school teachers recognise the conflicting paradigms and how they handle the
geometric work conducted, in sometimes unintended ways, by their students. This is done
by analysing teachers ’ reactions to specific answers students offered to the Charlotte and
Marie problem, an “ambiguous” problem with various solutions depending on the paradigm
adopted. As a result of the study, we found that, beyond similarities due to a shared
mathematical background, the way secondary schoolteachers handle students ’ answers
varies with their conceptions of geometric work. Implications are drawn regarding the
teaching of geometry and the training of teachers.
Keywords Geometry . Geometrical paradigms . Geometric work . Epistemic conception
1 The general purpose
1.1 On knowledge required for teaching mathematics
Since the early 1970s, numerous studies carried out in several countries have evaluated
teachers ’ mathematics subject knowledge based upon the common belief that the greater the
subject knowledge, the better the teaching. In the case of geometry, mathematical subject
knowledge among teachers appears uneven with a lot of gaps especially among elementary
school teachers. Yet, the link between limitations in subject knowledge and the quality of
the teaching is not easy to study. Identifying the influence of thes
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