During my years as a physics teacher, I tried an experiment: I put all of my content online, and spent class time helping them with problem-solving. The result was astonishing -- the quality of learning improved overnight.

I discovered that students learn the most when they're able to learn at their own pace and take charge of their learning. So now I present you with all of that content, and more to come in the future. That way, more people can gain those benefits.

I truly believe that a more educated world is best for everyone. So let's learn as much as we can together.