If you haven't already stumbled on to this fabulous resource then may I suggest you jump over to Freely Educate now and take a look around.
You will find links to so many free educational resources, careful you might be there awhile.
From Lori, the author of Freely Educate,
At FreelyEducate.com, I focus on high quality, 100% free educational finds. I post for the children: preschool, elementary, middle school, and high school. I also post for homeschoolers, teachers, students, and families who love to learn together.
My goal is to prove a high quality education can be free. I don’t have a problem with paying for education. I’m just trying to remove one obstacle - finances - from those who think they “can’t” give - or get - a good education. Even if you don’t have money, you can still have knowledge. Isn’t that a beautiful truth?
This is definitely one to subscribe to so you don't miss anything.