Grade 7 students’ geometrical thinking in mathematics classroom using Open Approach
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Abstract
The aim of this research was to analyze the level of geometrical thinking of grade 7 students in mathematics classrooms using open approach. A qualitative method was used in this research. The target group was 7th-grade students of the Demonstration School of Phuket Rajabhat University. Data were collected in the second semester, 2018 academic years. Research instruments were the lesson plan, video recording, and IC recording. Protocol and descriptive analysis were used following Inprasitha (2010) and Van Hiele (1986).
The result revealed that:1. Posing open-ended problem; students explained the characteristics, properties, elements of geometry both two and three-dimensional geometric forms, it shows level 0 and 1.2. Students’ self-learning through problem-solving; students explained the properties, elements, and relations of geometry both two and three-dimensional geometric forms, it shows level 0 and 1.3. Whole class discussion and comparison; students explained and reasoned the properties, elements of geometric figures, moreover they reasoned the relation between two and three-dimensional geometric forms, it shows levels 0, 1, and 2.4. Summing up by connecting students’ emergent mathematical ideas; students explained and reasoned the properties, elements of geometric figures, moreover, they are able to reason relation between two and three-dimensional geometric forms, it shows level 0, 1, and 2.
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