THE ACTION RESEARCH TO DEVELOP INSTRUCTIONAL ACTIVITIES IN MATHEMATICS USING PROBLEM BASE LEARNING IS SUPPLEMENTED WITH A SKILL EXERCISE BASE ON THE PROBLEM-SOLVING PROCESS OF POLYA TO THE ABILITY TO SOLVE MATHEMATICAL PROBLEMS OF PHATHUMSUKSA 5 STUDENTS.

Abstract

This action research aimed to 1) develop teaching and learning activities using problem-based learning supplemented with Polya's problem-solving exercises for grade 5 students; 2) study the mathematics problem-solving ability using problem-based learning supplemented with Polya's problem-solving exercises; and 3) compare the mathematics achievement of Phathumsksa 5 students learning using problem-based learning supplemented with Polya's problem-solving exercises between before and after learning.The research results found that 1) the development of learning activities using problem-based learning supplemented with Polya's problem-solving skill exercises There are 6 important steps included Step 1: defining the problem, Step 2: understanding the problem, Step 3: conducting research, Step 4: synthesizing knowledge, Step 5: summarizing and evaluating the answer, and Step 6: presentation. and evaluating It was found that students' mathematics problem-solving ability scores of students who received learning activities using problem-based learning supplemented with Polya's problem-solving skill exercises was 32.50, or 81.25 percent. Students had an average score of not less than 75 percent. 2) The comparison of learning achievement in mathematics studied using problem-based learning supplemented with Polya's problem-solving skill exercises found that the learning achievement in mathematics had an average score before studying of 17.43, or 58.08 percent, and an average score after studying of 23.78, or 79.25 percent. Students had an average score after studying of not less than 75 percent and an average score after studying higher than before studying.