Does anyone use Khan Academy? I do, but I unfortunately don't have the time to use it very frequently.
Khan Academy is the greatest, though. It's a website, you sign up with an account, and suddenly, you're set up to learn! Math, science, some arts and humanities, like history or art history, some economics. I'm using it to brush up on my math. I could never hack calculus, so I want to learn it by the time my daughter needs it (years and years away but still!). If you need to brush up for helping your kids with homework, Khan Academy is the place to do it. And it's FREE. All you need is time and interest.
I love that you can just use it and learn.
I need to snag a refresher course for math soon. I have a math class coming up that is going to probably make me want to slam my head into a wall. Maybe refreshing my brain will help with the stress.