Abstract: The purpose of this study is to determine the effectiveness of an inquiry learning models to improve student mastery of concepts and their creative thinking. This research was conducted in a class of year 12 students at a vocational school using a pre-test and post-test control group design. Data collection was conducted using pre-test, post-test, observation and questionnaire. Improvement of creative thinking skills for the group of students has the highest control on the indicators of building knowledge that has been possessed by students with N-gain 0.40 with the medium category, the lowest on the indicator of seeing limited information with N-gain 0.15 with the low category. Increased mastery of concepts and creative thinking skills of students caused by the use of inquiry learning models in effective colloidal subject matter with a sig. (2 tailed) value <0.05, namely there are differences in the increase in mastery of concepts and creative thinking skills after the application of inquiry learning models compared to the control class. Students and teachers respond positively to the learning process with the inquiry learning model.
Rafiuddin and Ibrahim , 2019. Chemistry Student’s Conceptual Understanding and Creative Thinking Skills Development Through Inquiry Models in Learning of Colloid System. Journal of Engineering and Applied Sciences, 14: 8511-8518.