The aim of the study is to develop and introduce concept cartoon, animation and Diagnostic Branched Tree(DBT) supported Conceptual Change Text (CCT) related with “gas pressure” in the level of elementary 8thgrade. The CCT is a teaching material based on conceptual change approach. It is preferred in order to achieveconceptual change in various studies. In the CCT, concept cartoons were used in order to provide that studentsclearly express their prior knowledge. Animations were used to concretize abstract concepts. Also, DBT wasused in parallel with the specified in the Science and Technology Instruction Program alternative assessment andevaluation in order to provide that students discuss in the classroom. When taken into account that studies relatedwith “gas pressure” is not enough and misconceptions related with “gas pressure” sufficiently are not studied inthe Science and Technology course books, it is believed that the developed CCT in this study is an alternativesource material for student and science teachers.