Needs Analysis of The Development STEM-PjBL Based LKPD To Train Students' Critical Thinking Skills

Critical thinking skills is very important in the science learning process. Teaching materials are needed to encourage critical skills. This research was conducted analyze needs of teachers and students for development STEM-PjBL based LKPD train students’ The method used descriptive investigate initial conditions. data collected using an interview sheets distributing analysis questionnaires through google form. subjects this study were physics teacher 25 class XI IPA SMA Tebing Tinggi. datas qualitative techniques. results showed that: (1) had never before, (2) not familiar with activities that require they have difficulty understanding use formulas, (3) agree