Critical thinking is an essential ability for all aspects of human life. Learning practices in schools do not encourage critical thinking. The problem of this research are: 1) is the problem-based learning model developed in the feasible category? 2) How high is the level of critical thinking of students? 3) Among the factors: learning motivation, equilibration, and/ discipline, which one is the determinant? The method used is Research Development; this study collected data from 37 students participating in Learning Assessment Lectures from 2 classes. Data were collected using a rating scale consisting of 41 items, which tested valid and were 37 items reliable. Data processing assisted by SPSS version 25. This research successfully developed a Problem Based Learning Model that was declared feasible; Achievement of students' critical thinking skills at a high level. Obtained 2 models determining students' critical thinking skills. This finding is very useful for the management of education quality within the framework of the effectiveness and productivity of Higher Education Learning
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