Practical Physics is a collection of physics labs and experiments, activities, and more. There are also lesson plans, tips, and guidance on how to teach different concepts in physics.
I was very impressed with the collection of materials and was especially impressed with the guidance for teachers. This section can help teachers break down and explain concepts better.
The site breaks things down by major physics topic. There are also sections on physics applications and physics at play which can help teachers give their students an example of why this concept is important or useful.
There are also links to other physics resources.
I found this site to be very useful and very easy to use and have already used some resources from it in my physics classes.