TY  - JOUR
UR  - http://fmipa.uny.ac.id
N2  - Students? performance in geometry and hence, their geometric thinking remain a concern for researchers globally. This quasi-experimental research design aims to investigate the effects of Phase-Based Instruction (LS-PBI) using Geometer?s Sketch Pad to reveal Thai students awareness of geometric concepts. Three groups of mixed ability Grade 7 students (aged 12 ? 13) were chosen as participants in one of the schools in Yala Province, Thailand. These groups were taught the topic of Properties of 2D and 3D geometric shapes in a cycle of three instructions by three different teachers engaging in Lesson Study method. A twelve-item multiple choices test was administered to students in each group before and after each lesson study session to assess their understanding of geometrical concepts. Findings of the pre-tests and post-tests revealed that LS-PBI using GSP was effective in revealing students? shifts in awareness of geometrical concepts. 
Keywords: Geometer?s Sketchpad, Geometric Thinking, Geometry, Lesson Study
AV  - public
SN  - 978-979-96880-8-8
TI  - SHIFTING STUDENTS? AWARENESS OF GEOMETRICAL CONCEPTS THROUGH LESSON STUDY
PB  - Faculty of Mathematics and Sciences Yogyakarta State University
A1  - Lilla, Adulyasas
A1  - Shafia, Abdul Rahman
JF  - Proceeding of  International Conference On Research, Implementation And Education  Of Mathematics And Sciences 2015 (ICRIEMS 2015), Yogyakarta State University, 17-19 May 2015
ID  - UNY23190
Y1  - 2015///
ER  -