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Libeskind, Shlomo; Stupel, Moshe; Oxman, Victor – International Journal of Mathematical Education in Science and Technology, 2018

In this paper, we highlight examples from school mathematics in which invariance did not receive the attention it deserves. We describe how problems related to invariance stimulated the interest of both teachers and students. In school mathematics, invariance is of particular relevance in teaching and learning geometry. When permitted change…

Descriptors: Mathematics Instruction, Mathematical Concepts, Geometry, Teaching Methods

Oxman, Victor; Stupel, Moshe – International Journal of Mathematical Education in Science and Technology, 2018

A geometrical task is presented with multiple solutions using different methods, in order to show the connection between various branches of mathematics and to highlight the importance of providing the students with an extensive 'mathematical toolbox'. Investigation of the property that appears in the task was carried out using a computerized tool.

Descriptors: Mathematics Instruction, Problem Solving, Geometry, Algebra

Stupel, Moshe; Oxman, Victor; Sigler, Avi – International Journal of Mathematical Education in Science and Technology, 2017

We present a geometrical investigation of the process of creating an infinite sequence of triangles inscribed in a circle, whose areas, perimeters and lengths of radii of the inscribed circles tend to a limit in a monotonous manner. First, using geometrical software, we investigate four theorems that represent interesting geometrical properties,…

Descriptors: Geometry, Geometric Concepts, Investigations, Mathematical Concepts

Oxman, Victor; Stupel, Moshe; Segal, Ruti – International Journal of Mathematical Education in Science and Technology, 2017

An important and interesting area in the study of triangle geometry is the related issue of extrema problems and inequalities. These problems play a significant role in the mathematics study program in high school. In tasks such as these, the difficulty level is high when one does not know in advance what the expected answer is. When one knows…

Descriptors: Mathematics Instruction, Geometric Concepts, Teaching Methods, Secondary School Mathematics