A STUDY OF MATHEMATICS LEARNING ACHIEVEMENT ON “LINEAR EQUATION SYSTEM” OF GRADE 9 STUDENTS AT DEMONSTRATION SCHOOL OF SUANSUNANDHA RAJABHAT UNIVERSITY BY USING PROBLEM BASED LEARNING
The purpose of this research was to study the mathematics learning achievement
on “Linear Equation System” of grade 9 students at Demonstration School of Suansunandha Rajabhat University by using problem-based learning. The sample-group was 40 students. The research instruments were 5 lesson plans on “Linear Equation System” by using problem-based learning, 20 items with four multiple choices of mathematics achievement test with the discrimination .29 - .76 , the reliability of .80 , and an evaluation forms of learning activities by using problem-based learning. Pre-test and post-test with mathematics achievement test. Mean, standard deviation, and match paired t-test were used for analyzing data. The research results revealed that mathematics learning achievement of students after teaching by using problem-based learning , the scores of the post-test was higher than pre-test and higher than the criteria of 70 percent at the .05 level of significance.