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The aim of this study is to increase the scientific behavior and critical thinking skills for senior high school students in Economy subject through the development of learning model design development with problem-based implementation. This study was conducted in Senior High School Stella Duce 1 and 2 Yogyakarta using research and development approaches, and referring to ADDIE model (Analyze, Design, Development, Implementation, Evaluation Model). The data was analyzed using descriptive analysis technique and paired sample t-test. This study was started by analyzing the learning media, the process and the evaluation of economy subject of senior high school which was measured by Bloom taxonomy. Furthermore, the researcher devised learning model design development problem-based and limitary tryout. The result shows that basic competencies, indicators, learning objectives in learning media was dominant to the understanding level. The learning process of economy subject had reached a higher level which was analysis level and evaluate level. The critical thinking skills which was needed in daily test and midterm test in economy subject was dominant in the understanding level. The limitary tryout results showed that the implementation of problem-based learning model was proven can develop the scientific behavior and critical thinking skills of students. Keywords—scientific behavior, critical thinking skills, problembased learning

Development of Model Design Using Problem-Based Learning to Increase the Scientific Behavior and Critical Thinking Skills