YES! We're homeschooling for free and I count netflix as free cause it's our only form of TV, we'd be paying for it if we were homeschooling or not.
Once you sign up you see way, way, way, way, way, way more movies than the few they show you for each genre before you sign up.
They have a ton of educational stuff from rock 'n learn, leap frog, liberty kids, to lots of PBS and national geographic stuff, they have an algebra series, a geometry series, an ASL series, and just a TON of documentaries on everything imaginable.
I see 24 movies per page-
For science and nature documentaries I have 36 pages
historical documentaries 60 pages
political documentaries 24 pages
And that's just a couple of the categories for documentaries for DVDS
Under watch instantly ...
historical has 11 pages
science and nature has 6 pages
political has 8 pages
I also highly suggest a roku box.
I have a few posts on my blog about netflix/roku and how much I love them both. If you have any questions about either feel free to contact me. http://theskinnywallet.wordpress.com/?s=netflix