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http://dx.doi.org/10.7468/jksmec.2018.21.2.209

Angle concepts and introduction methods of angles in elementary mathematics textbooks  

Kim, Sangmee (Department of Mathematics Education, Chuncheon National University of Education)
Publication Information
Education of Primary School Mathematics / v.21, no.2, 2018 , pp. 209-221 More about this Journal
Abstract
Angle concepts have a multifaceted nature such as quantitative aspects as the amount of rotation, qualitative aspects as geometric shapes, and relationship aspects made with planes or lines. This study analysed angle concepts and introduction methods of angles in elementary mathematics textbooks which have been used from the Syllabus Period to the 2015 Revised Mathematics Curriculum. First, the concepts of angles in mathematics textbooks focus through the definitions, representations, and components of angles presented in mathematics textbooks are analyzed. Secondly, how various aspects of each angle are sequenced through the tasks or activties in the introduction of lesson is looked. As a result of analysis, the methods of introducing angles in the changes of mathematics textbooks have mainly focused on learning about geometric shapes and relations of components. In the mathematics classroom, students should experience various aspects of geometric shapes, rotations, relational aspects of points, lines and surfaces, and support and link them to form a wide range of concepts.
Keywords
angle; angle concepts; representations of angle; definitions of angle; introduction methods of angles; elementary mathematics textbooks;
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