PENGGUNAAN HYPOTHETICAL LEARNING TRAJECTORY (HLT) PADA MATERI ELASTISITAS UNTUK MENGETAHUI LINTASAN BELAJAR SISWA KELAS X DI SMA NEGERI 1 INDRALAYA UTARA

Abstract

This study aims to a learning trajectory about elasticity for tenth grade students of SMA Negeri 1 Indralaya Utara by using Hypothetical Learning Trajectory (HLT). The method used in this study is design research. The subjects of this research were six students in the pilot experiment and 24 students in the teaching experiment. A set of activities designed in HLT was applied and developed to gain the understanding of elasticity concept. The HLT designed during the preparation phase was compared to the students’ actual learning trajectory during the implementation in the teaching experiment. Retrospective analysis of the teaching experiment showed that students have diverse conjecture thinking in understanding the concept of elasticity. This learning trajectory describes the development of student’s understanding in material of elasticity during the learning process that consists of learning goals, learning activities and conjecture of students’ thinking. Students who initially assumed that elastic material only rubber and spring, after the observing and classifying objects of elastic and nonelastic activities, started to understand the concept of elasticity and the elastic limit. In the next activity, choosing plastic experiment, students could determine the modulus of elasticity of an object. Some students assumed that all spring have the same constants, after Hooke’s law experiment and created the graphs of Hooke’s law, student understood that the elasticity of the spring depends on the spring constant. It was got by students analyzing about the relationship of force F with the length of the spring (extension ). Based on this research, it was found that the use of HLT could determine the students' learning trajectory in understanding the concept of elasticity.