PhET simulations: this page has great simulations that can be used to help improve understanding of materials. Also, we will be using many of the simulations in class
https://phet.colorado.edu/
Kahn Academy: These resources and videos are great tools to use when studying for the exams
https://www.khanacademy.org/science/physics
The Physics Classroom: Another great resource with videos and practice problems
https://www.physicsclassroom.com/