I'm referring to things like "Nicole the Math Lady", "Kahn Academy" and other supplemental education resources. Even Wikipedia can get you on the right track with any topic. Since I homeschool my son I don't know if the schools have gotten better.

I took an accelerated Calculus class one summer. My parents spent hundreds of dollars on a VHS calculus set to supplement the class because it was moving too fast for me. That was the difference maker in me passing. Today, getting that info is trivial and available to everyone.