This research aims to increase the understanding of the concept of pressure in Class VIII students of Kanda One Roof Junior High School through the PBL Learning Model with Demonstration and Practice Procedures. This type of research is a type of Classroom Action Research (PTK) which focuses on the classroom atmosphere which is often called Classroom Action Research. The research population is class VIII students of SMP Satu Atap Kanda, one class is taken randomly, namely class VIII B. The method of analyzing information in this matter is tried to use statistics, tabulating information based on variables obtained from all respondents, Descriptive Statistical Test and T-test Analysis Method. Based on the results of this research, the description of the concept of pressure in Kanda One Roof Junior High School students has increased. This shows that there is a change in the increase in the students' concept description in the PBL learning model with demonstration and practice procedures.