Expedience analysis of student worksheets (LKM) to support nuclear physics learning on the topic of natural radioactivity

Based on the observations, data from student's response shown that the nuclear physics was an abstract material, so it needs visualization in the learning process. The facts found that in the process of nuclear physics learning have not supported by virtual laboratory activities yet. The virtual laboratory is needed by the students to visualize the abstract material of nuclear physics. This research aims to develop valid and practical student worksheets (LKM) as a support of the virtual laboratory activities using PhET simulation on the topic of natural radioactivity. The method that used in this research is Research and Development (R & D) by applying the ADDIE model by steps: analyze, design, development, implementation and evaluation. The results of this research shown that student worksheet that have developed are valid and practical to supporting virtual lab activities.