The development of problem-based learning (PBL) based student worksheets has been carried out in learning calorimetry in class XI.1 SMA Srijaya Negara Palembang. The purpose of this research is to produce valid, practical, and effective e-LKPD on the topic of calorimetry material based on problem-based learning (PBL) using liveworksheets. The development was carried out using the ADDIE model co…