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Students are often get academic problems in school. One of the reason might caused by the lack quality of lesson process that done by the teachers. In this research, researcher will show that students’ outcome is not only influenced by the teaching method, but also influenced by students creative thinking skill. Some of the earlier researchers have declared about the importances of  creative thinking skill for 21 century skills. This research used observation method, which was held in a state senior high school in Jakarta. Some of eleventh grade students were being the participants of the research. Researcher got the data by giving an essay test in Physical Optics to the eleventh grade students. Some different levels of creative thinking skill were identified and be the main matter in creating multirepresentation design for Physical Optics learning. Result of this research is that some of students have low level of creative thinking skill. Researcher conclude that some treatment needed to increase students’ creative thinking skill

Creative Thinking Skills, Physical Optics learning, case study