I guess I've always had a soft spot for Apple - they do make some of the coolest kit around. And so too, their software. Take iTunes for example. Sure - everyone uses it for music and maybe for iPod games, but increasingly it is serving as a resource for all manner of educational material for anyone to consume. A large number of universities have used iTunesU for some time now, but over recent years a growing number of K-12 institutes have added resources that you might find valuable.
According to Apple iTunesU is ..."The world’s smartest download.
Discover iTunes U and never stop learning. Download lectures, discussions, language lessons, audiobooks, podcasts and other opportunities for enlightenment — all from top universities, museums and other cultural institutions around the world. So whether you’re a college student or a student of life, learn for free with iTunesU.
This post just gives you the instructions to find some K-12 content and download it. Have a good look around - there is some good stuff here that you can use tomorrow,