This looks like a great website. It covers around twelve general chemistry topics and includes teacher resources, activities, videos, and labs for students.
This web site provides links to other websites that chemistry teachers can use in the classroom. The site breaks down the recommended websties by category so it's easier to navigate.
This is an Amazing resource for modeling science topics with simulations! Run by the University of Colorado at Boulder, there are tons of interactive simulations including ones I've used in my classes that are very helpful in visualizing certain topics. The website also has shared activities from teachers across the country including lesson plans, homework, demos, and labs for all grade levels!
This resource I found through Google search helps students understand different physics phenomena. These simulations show the students the physics behind various topics such as forces and motion.