PhET is a free interactive simulation tool developed by the University of Colorado at Boulder and designed for teaching in science, technology, engineering, and math (STEM) fields to enhance students' learning experience and understanding in a lively and fun way. Core Features Multi-Disciplinary Coverage PhET provides simulation content covering a wide range of disciplines, including physics, chemistry, biology, and math, to suit the learning needs of different age groups and educational stages. Interactive Learning All simulation contents support users to interact with the simulation model, such as adjusting variables, observing experimental results, etc., which help students to add through practice...