The use of technology in learning is highly demanded during the covid-19 pandemic and the development period of the Industrial Revolution Era 4.0. The right learning model is a challenge that must be solved by educators. The LMS-assisted FGIL model was introduced as an appropriate model used for current and future learning. This development is a type of EDR (Educational Design Research) research with a plomp research model. Lecturers as expert review, and 12 students became the subject of research in this development research. The data obtained in the form of content validity data and media validity was processed using Aiken's V formula, while practicality data was processed with practical percent. Based on the results of the study obtained a value of V for content validity and media validity of 0.88; and 0.91; which is in the valid category. Then the practical results showed a value of 89.00% with a very practical category. So, it can be concluded that the model developed has been valid and practical so that it is worth using in learning

This research produce LKPD STEM-PjBL (Science, Technology, Engineering, and Mathematics-Project Based Learning) integrated on Thermochemical learning, then reveal its validity and practicality categories. This type of research is Research and Development, with 4-D model consisting of: (1) define, (2) design, (3) develop, and (4) disseminate. LKPD was validated by 3 Chemistry lecturers of FMIPA UNP and 2 Chemistry teachers, then practicalited by 2 Chemistry teachers and 25 students of Class XII MIA 2 SMA UNP Laboratory Development. The validity and practicality tests were using Cohen’s kappa analysed, yielding 0.816 for the validity test and 0.837 and 0.855 for the teacher and student practicality test with very high categories. The data shows that the LKPD produced is valid and practical