In this study, a short-term introductory PBL education program is developed for learners before full-scale PBL practice, which include high school students who have not experienced PBL and college students who have little experience of PBL. This paper shows on the educational practice for a short-term design project targeted at high school students. Through a questionnaire survey conducted after this project, we received positive feedback from high school students who have taken this educational program.