You're into sci-fi? I think that's one of the hardest genres to write because it's not to everyone's taste (though no genre is...) and it's hard to have a plausible storyline happening without the story itself being a total load of robot-killing dross.
The best sci-fi tends to be thought-provoking, and by that I don't mean "What would robot innards look like?" A lot of good sci-fi makes us think - and generally they cover very topical issues, like global warming. If you wrote about the Earth in 50 years and described it as a stark, desolate wasteland unable to sustain life (please read Z for Zachariah. This is good sci-fi). Teachers are out there and when you do write about things which move them, or make them think, they are less likely to pick up their red pens and more likely just sit down and read.