Competition in science and technology inthe 21st-century created challenges in the field of education that triggered the development of scientific approaches. One of them was the STEM-CP approach which consisted of Science, Technology, Engineering, Mathematics and Contextual Problems. One of the advantages of the STEM-CP approach was that it could train students critical thinking skills. The STEM-CP approach could be applied in learning media, one of which was a module that was useful for training students learning independence. The purpose of this study was to describe the application of the STEM-CP-based sound wave module to the critical thinking skills and learning independence of high school students in physics. The research design used was one group pretest-posttest. As the results of the study, students experienced an increase in students critical thinking skills with an N-gain value between 0.67 to 0.74 in the medium and high categories. The fairly good category changed to 85 in the impressive category. So that the application of the STEM-CP-based sound wave module was proven to be successful in improving students critical thinking skills and independent learning.