Kyungah Choi and Prof. Suk were invited to a special talk about the flipped learning by Korea Aerospace University [한국항공대학교]. In the seminar, professor shared her teaching experiences describing the course flow, class contents, and some know-hows. Then Kyungah followed the talk and introduced the roles and duties of the teaching assistant(TA) of the flipped learning in university education. She has served as an in-class TA for three years and received highly positive evaluation scores from the students. Color lab is proud of having expertise and skills in education methods in addition to the color knowledge.