The purpose of this research is to describe the needs for teaching materials developed, elaborate the design characteristics of teaching materials developed, develop valid and effective learning media based on Problem Based Learning (PBL), and find the learning outcomes of style material among science students in class IV of Dukun State Elementary School, Karangtengah Demak District. This is a development research that uses 10 steps. The validation is carried out by two material experts and the results of effectiveness test is conducted on 50 students of grade four. The data is collected by using needs questionnaire, expert validation sheets, student learning outcomes and documentation. The data is analyzed by qualitative and quantitative techniques as well as t-test acquisition analysis to find the effectiveness of teaching materials developed. Results of the research will be the produce of science learning application with style materials. The use of teaching materials based on PBL and style material in class IV at elementary schools are expected can improve student’s learning outcomes in the aspects of affective, cognitive and psychomotor.