ABSTRACT Research on the development of LKPD based on a Virtual Laboratory has been carried out PhET on motion kinematics material to improve thinking skills critical students in class X MIPA 5 SMAN 3 Palembang. This research aims to produce valid and practical LKPD. This research is research development using a 4-D model (Four D) consisting of 3 stages include the definition stage, the design …