EFFECT OF LEARNING BY USING PROBLEM-BASED LEARNING TOGETHER WITH THE MOLECULAR ORBITAL MODEL WITH ANTI-BONDING ORBITAL ON DEVELOPMENT THE ANALYTICAL THINKING SKILL AND LEARNING ACHIEVEMENT OF SUBSTITUTION AND ELIMINATION REACTION OF ALKYL HALIDES OF SCIENCEPRE-SERVICE TEACHERS ผลการจัดการเรียนรู้โดยใช้รูปแบบปัญหาเป็นฐานร่วมกับการใช้แบบจำลองออร์บิทอลเชิงโมเลกุลแบบต้านพันธะต่อการพัฒนาทักษะการคิดวิเคราะห์และผลสัมฤทธิ์ทางการเรียน เรื่อง ปฏิกิริยาการแทนที่และการกำจัดของสารแอลคิลเฮไลด์ ของนักศึกษาวิชาชีพครูสาขาวิชาวิทยาศาสตร์
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Abstract
The purposes of this study were to 1) develop analytical thinking skills of the pre-service science teachers for substitution and elimination reactions mechanisms of alkyl halides and 2) compare between before and after learning outcomes of the pre-service science teachers by using problem-based learning together with the molecular orbital model with anti-bonding orbital. The samples of this research were 23 students of the 2nd year pre-service science teachers. The research tools used were: 1) learning management plan for the substitution and elimination reaction of alkyl halides, 2) pre-test and post-test of analytical thinking skill including 6 subjective items 30 point, and 3) pre-test and post-test in multiple-choice 30 points. Data was analyzed statistically from mean (), standard deviation (S.D.) and t-test dependent. The research was found that:
1. The analytical thinking skill for the substitution and elimination reaction mechanisms of alkyl halides of the pre-service science teachers after using problem-based learning together with the molecular orbital model with anti-bonding orbital was significantly higher than before learning at .01 significance level.
2. The learning achievement in learning the substitution and elimination reaction of alkyl halides of the pre-service science teachers after using problem-based learning together with the molecular orbital model with anti-bonding orbital was significantly higher than before learning at .01 significance level.
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