Although PBL (Project Based Learning), which can practically cultivate problem solving ability, has attracted attention, it is difficult for teachers unfamiliar with PBL to provide guidance and facilitation for PBL and for PBL beginners to make progress well. In this study, to develop an adaptive support system for PBL practice, PBL themes were classified, and the representative procedure for each theme and the correspondence between the possible issues and the facilitation were clarified. As a result, it was found that themes can be classified into five types and categorized by eight kinds of activities.