Some years ago, I created an online course in SF and fantasy writing, aimed primarily at high school and middle school students, called Writing Science Fiction and Fantasy. It was published on CD by a company called MathSoft, and eventually put online by them, also. (It actually grew out of a distance-learning TV broadcast I hosted, which was beamed into middle school classrooms for two seasons.)
It’s been unavailable except on the used-CD market for a while, but that’s about to change. I’m refitting the course for online viewing, and hope to have it up again and open to the public in the next week or two. It’ll be free of charge, and as friendly to the user as I can make it. The URL will be writeSF.com. If you’re an aspiring writer, or know one, come check it out in a week or two.