Abstract:
The study of using model-based learning aimed to examine learning achievement in topic of DNA Technology, study scientific reasoning and observe satisfaction of tenth grade students. The target group was 45 tenth grade students in second semester of 2019 academic year at Chonradsadornumrung school. The research instruments were provided consist of lesson plans containing Model-based learning, learning achievement test, scientific reasoning test and satisfied questionnaire. Research information was processed in descriptive as classroom action research. Analyze statistics were performed by mean, standard deviation, percentage, and effect size. Research results revealed that: 1. The students raised higher learning achievement in topic of DNA Technology after treated with model-based learning. 2. The students gained higher scientific reasoning after treated with model-based learning. 3. The students satisfaction being treated with model-based learning held in high level.