Problem solving ability is the main objective of mathematics learning. In conventional learning currently still dominant in Indonesia, most of the students are accustomed to memorizing without any development of problem solving ability. One kind of learning model could assist learners to practice solving problems is Creative Problem Solving (CPS) model assisted with interactive CD. This research is aimed to find out whether the problem solving for students joining CPS model assisted with interactive CD has betterment that those joining the conventional one, and whether arise difference among upper, middle, and lower group students in the learning. This research is a quasi experimental research, with all the population of grade X regular students of Senior High School 1 Semarang in the academic year 2010/ 2011. As samples, several students were taken randomly, one class as experiment and the other as a control one. The measuring instruments used were problem solving tests. The data were analyzed by the use analysis independent sample t test, and compare means one way anova. The results of the research show that problem solving ability of the students joining the CPS model assisted with interactive CD is better than those joining the conventional one, and there is difference problem solving ability among upper, middle, and lower group students in the learning. Therefore, this model could be applied as an effective alternative learning model to reach problem solving ability maximally, especially on the subject trigonometry grade X. Pengaruh Model Pembelajaran Matematika Creative Problem Solving (CPS) ¦ (Suparman) Key words: Problem Solving, CPS, Interactive CD, Creative.