To approach science education for all which has been required in STS program, it is indispensable to develop variously differentiated education courses that are suitable for various students. In order to do that, we have to abstract essential items that are dealt with in common from science textbook which is regarded as the kernel of science education. Then, these items are developed by fitting for each level-STS science study models. The purpose of this study is to improve the level-based investigation competence by applying these models to various level learning. We obtained some results as the following: First, there has been a positive change for attitude to study science in part. Second, we find the materials in our life and this study is relating to science, technique and society. So we find out the fact that there is close connection between science technique and our life. And also it helps encourage to learn. Third, in the process of searching for and producing STS materials, students have a chance to study for themselves by working out self-leading research activity. Finally, students can reduce a preconception that science is difficult by encouraging attitudes to search for and make our problems in our life scientifically and the habits thinking of and understanding our daily life itself in the scientific sight.