A few things: 1) There's an old game called Rocky's Boots, it subtly teaches engineering basics and is fun as hell. If you haven't checked it out yet, most definitely do. 2) Regarding computer teachers, krschmidt is definitely right. Teachers mostly do want to teach to the district guidelines because technology advances too rapidly for them and they want colleagues to be able to benchmark and bounce ideas with. The English literature canon doesn't change much, so those teachers feel they have a little more leeway. 3) Your market may be parents who want their kids to know how to program, especially homeschoolers. I don't know how large that market is, but it's definitely worth exploring.