DEVELOPMENT OF A SERIES OF LEARNING ACTIVITIES IN CONJUNCTION WITH PROBLEM-BASED LEARNING TO STRENGTHEN MATHEMATICAL PROBLEM-SOLVING SKILLS OF 3RD GRADE STUDENT

Abstract

This research aimed to (1) develop a series of learning activities integrated with problem-based learning for Grade 3 students to meet the criterion of 75/75; (2) compare the learning achievement before and after implementing the series of learning activities; and (3) compare the mathematical problem-solving skills before and after implementing the series of learning activities integrated with problem-based learning. The target group consisted of four Grade 3 students from Chaiyaphum Rajabhat University Demonstration School in the academic year 2024, selected through purposive sampling. The research instruments included: (1) 15 lesson plans for the Grade 3 learning unit on addition and subtraction of numbers with sums and operands not exceeding 100,000, with a total duration of 15 hours; (2) 15 learning activities designed to enhance mathematical problem-solving skills for Grade 3 students; (3) an achievement test for the Grade 3 learning unit on addition and subtraction of numbers with sums and operands not exceeding 100,000, consisting of 30 multiple-choice questions with 4 answer options. The statistical methods used in the research included percentage, mean, and standard deviation. The research findings were as follows:   

1) The series of learning activities integrated with problem-based learning for Grade 3 students demonstrated an efficiency of 93.48/91.67, exceeding the established criterion of 75/75.

2) Grade 3 students showed higher learning achievement after participating in the series of learning activities integrated with problem-based learning compared to before. The effectiveness index was 0.8276, indicating a  developmental gain of 82.76%.

3) Grade 3 students exhibited improved mathematical problem-solving skills after engaging in the series of learning activities integrated with problem-based learning. The effectiveness index was 0.7885, reflecting a developmental gain of 78.85%.