Problem-Based Learning on Biology to Development of Critical Thinking Skill for Mathayomsuksa 5 Students

Abstract

This research aims to study the development process of the critical thinking skill for Mathayomsuksa 5 students by the Problem-based learning (PBL). The target and control groups were Mathayomsuksa 5 students of Princess Chulabhorn’s College, Satun selected by the purposive sampling. The research method based on classroom action research of Kemmis and McTaggart (1990) comprising plan, action, observe and reflect. The research tools comprised three teaching plans based on the PBL, Studying Searching and Problem’s answer form and Critical thinking pretest and posttest. The results indicated that the PBL had a tendency to improve the critical thinking skill of the target group based on the target group had not only critical thinking posttest score significantly higher than pretest one but also higher significantly than posttest score of the control group at .05 levels.