THE EFFECT OF USING MULTIPLE REPRESENTATIONS LEARNING ACTIVITY ON MATHEMATICS PROBLEM SOLVING ABILITY IN SYSTEM OF EQUATIONS WITH TWO VARIABLES OF MATHAYOMSUKSA III STUDENTS

Abstract

The purposes of this research were as follows: 1) To Compare the mathematics problem - solving ability in system of equations with two variables of Mathayomsuksa Three students before and after using multiple representations learning activity and 2) To Compare mathematical problem - solving ability in system of equations with two variables of Mathayomsuksa Three students after using multiple representations learning activities with a criterion of 70%. The research used the One - Group Pretest-Posttest design. The sample group consisted of 48 Mathayomsuksa Three students at Pathumwan Demonstration School, selected via cluster random sampling. The research instruments included 10 lesson plans focusing on multiple representations learning activities and a mathematical problem-solving ability test specifically designed for system of equations with two variables. The test had a difficulty (p) of 0.43 - 0.58, discrimination (r) of 0.51 - 0.78 and a reliability of 0.72. The statistical procedures used for data analysis were a t - test for the dependent samples and a t - test for one sample. The findings were as follows: 1) mathematical problem-solving ability after using multiple representations learning activities in system of equations with two variables was statistically higher than before being taught at the .05 level of significance; and 2) mathematical problem - solving ability after using multiple representations of learning activities in a system of equations with two variables, 24.13 out of 30 points, higher than the 70% criterion, with a mean 80.43% and a .05 level of significance.