DEVELOPMENT OF MATHEMATICS LEARNING TOOLS BASED ON A SCIENTIFIC APPROACH USING THE PROBLEM-BASED LEARNING (PBL) MODEL TO IMPROVE STUDENTS’ MOTIVATION AND LEARNING ACHIEVEMENT

Abstract

This study aimed to develop mathematics learning devices based on the scientific approach with a Problem Based Learning (PBL) model and to examine their effectiveness in enhancing students’ motivation and learning achievement. This research employed a Research and Development (R&D) design, complemented by tests of practicality, validity, and effectiveness. The research subjects were students of classes VIIA and VIIB at SMP Negeri 29 Palembang, totaling 54 students, with class VIIA as the experimental group and class VIIB as the control group. Data were collected using learning motivation questionnaires and achievement tests, and were analyzed through descriptive statistics, paired-sample t-tests, and N-Gain calculations. The results indicate that the developed learning devices were valid and practical, with an average validity score greater than 4.2. Implementation of these devices increased students’ learning motivation in the experimental class from a mean score of 58.7 to 82.4, whereas the control class increased only from 59.2 to 63.5. Students’ learning achievement in the experimental class improved from an average score of 62.5 to 84.3 with an N-Gain of 0.58 (medium-high), while the control class improved from 61.7 to 68.2 with an N-Gain of 0.16 (low).