PBL: problem based learning Mills indicated several problems in PBL in a structural engineering course also. One of them is that engineering programs don't offer enough design chances for students, and facilitators lack practical experience. Based on my own experience, it is difficult to choose a proper problem which can emulate real-world problem in a classroom. Young teachers haven't much industry experience themselves, especially for those received teachings centered instruction before, some teachers are not used to PBL teaching. Experienced faculty have to choose problems carefully. Because the course time doesn't permit complex problems, most content of PBL is learned by students, but it is not practical if give students a "too realistic" problem. Course Hours are about 48 hours generally, and it is not new if a real project takes three months or half a year. Therefore, facilitators should choose the key problem and control the time schedule for students in PBL. It demands the professors should understand their teaching area, not only about research topics and basic knowledge, but also about real experience.