Department of Mechanical Engineering at the University of Tokushima has introduced a teamwork-based learning method in 3D CAD exercise class which plays a key role in creative education of the Department. To further support the teamwork-based learning, a new web-based education system has been developed and introduced to the class in 2004, from which we have obtained significant results. This paper addresses an overview of the class with the final 3D models created by the student teams. Based on the results of questionnaire posed to the students who took the class, this paper discusses the educational effects of our teamwork-based approach.