I have studied algebra, geometry, trigonometry, and calculus. I was fairly certain that learning linear algebra would be only a refresher. I was wrong.

I watched this first lesson without taking notes, and thought to myself, “I really don’t think I’ve learned this before.” I actually had to watch it a second time for it to make sense.

I was able to keep my notes from this 40-minute lesson to only one page. That’s going to become important, I think, because this course includes 34 lessons.

The important thing is that I believe I fully understand the subject matter. If you want to learn, or re-learn, linear algebra, I’m going to go ahead and recommend trying this free online MIT course.