Validity of student's worksheets based on project based learning assisted tracker application

This research was motivated by demands of the curriculum 2013 which states that learning physics should ideally be presented by presenting facts, objects, or the phenomenon of physics directly to students. For this reason, it was necesssary to development an innovation in the form of developing learning models, learning resources and learning media that are in accordance with demands of the curriculum 2013, including learning resources in the form easily understood LKPD and can help students to learn independently, project based learning with a scientific approach to improved student's skills and tracker applications are the use of tecnological development so that students could be Internationally competitive. The purpose of this study was to validity of student's worksheets based on project based learning model assisted tracker application with valid criteria. This type of research is development research using plomp model with stage preliminary research, development or prototyping phase, and assesment phase (semisummative evaluation). The result ot the analysis of students need a LKPD as a learning resource and a project based learning model as a learning model and technology utilization with a tracker application. The result of the development stage was produced by a valid LKPD with a criteria (≥0,6) and used in the implementation stage.