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The purpose of this study was to describe the validity of the POE2WE model physics learning device assisted by PhET simulation to improve students' critical thinking skills. The learning tools described include the syllabus, lesson plans, LKPD, textbooks and pre-test post-test questions. The research was conducted in class XI SMA Negeri 2 Pasuruan on ideal gases. Descriptive-quantitative data analysis technique by describing and describing the assessment in percentage of agreement. The results showed that the percentage of syllabus validity was 95.75% in the very valid category, the percentage of RPP validity was 96.75% in the very valid category, the LKPD validity was 96.50% in the very valid category, the validity of textbooks was 94.25% with the category is very valid, and the validity of the pre-test post-test is 95.50% with a very valid category. Based on the results of the analysis of the data obtained, it can be stated that the learning device developed is feasible to use with very valid criteria.

This study aims to: (1) produce physics learning by using Project Based Learning (PjBL) with the assistance of E lerning Chamilo media that is appropriate to increase students' understanding of physics concepts during a pandemic, (2) to find out how high the understanding of physics concepts is by using learning Project Based Learning (PjBL) Assisted by Media E Lerning Chamilo, (3) find out how high the understanding of students' concept understanding in learning physics is increased by using the Project Based Learning (PjBL) learning model assisted by E Lerning Chamilo's media. The subjects in this study were 108 students of SMA Negeri 1 Kejayan Class MIA 4, MIA 5 and MIA 6. This study uses the Project Based Learning (PjBL) method assisted by Media E Lerning Chamilo. Defining is the initial stage of developing learning based on task analysis and concept analysis. Design is the second stage of the development of this learning which aims to produce an initial design of thE-Learning to be developed. The next stage is development which consists of testing the first stage including validation from the validator. the second stage of testing, namely the trial phase includes student responses to learning, along with giving interest questionnaires and also pretest and posttest questions. The data analysis technique used to analyze each data is the conversion of quantitative to qualitative values for the validation of Project Based Learning (PjBL) learning assisted by the E Lerning Chamilo media and the conversion of quantitative to qualitative values and normalized gain for interest data and student tests. The results of the development of this media show that: 1) E Lerning Chamilo based physics learning media is suitable for use as a physics learning medium with the subject of momentum, impulse, and collision. 2) the use of Project Based Learning (PjBL) learning media assisted by E Lerning Chamilo media can increase students with a gain value of 4.10 (high category).