This study aims to (1) determine an increase in collaboration and communication skills through project-based learning, (2) determine the relationship of collaboration skills and communication skills through project-based learning. The population of this research is six classes XI MIA and a sample of this research are two classes, an experiment class with projectbased learning and a control class with conventional. The instrument of collaboration and communication skills are the observation sheet and questionnaire. Improved collaboration and communication skills were analyzed using normalized gain (Ngain). A collaborative relationship with communication using the correlation test. N-gain results show that project-based learning can improve student's collaboration and communication skills, each in the medium category. The relationship between collaboration and communication skills shows a positive direction, which means that the more the collaboration skills increase, the better the student's communication skills.

Generally, student’s have low score of creative thinking skills. The students who have a low creative thinking skills will be difficult, in solve the problem. Creative thinking skills will increase learning process. This research aims to determine the effect of PBL with computer simulation towards student’s creative thinking skills. The research method use a pretest-posttest design. The subject of this research are three classes, with experiment1 class simulation supported with computer simulations used PBL, PBL use the experiment2 class, and the contol class use conventional learning. The instrument use essay tests that measure creative thinking skills based on problem. The avarage of pretest and posttest in experiment1 class are 20.28 and 76.62 with N-gain of 71%, in experiment2 class 20,84 and 68,06 with N-gain of 60%, and in the control class 20,35 and 44,05 with N-gain of 30% and all of that classes in the medium category. Based on the results of testing that there is significant difference obtained on PBL applied supported with computer simulations towards student’s creative thinking skills.