But do you think school should be relying on iOS/Android/Kindle?

Should they use something new? I don't want governments to pay (even more?) bazillions to Apple or Samsung, but making their own will also come expensive.

Ideas?

Apple hypes their platform specific tools, but there's no reason that at least traditional textbook content can't be provided in an easily cross platform way. Even the more complex content will likely become standardized to some extent in the near future (presenting it in web views is probably viable for a lot of it, especially once there's better support for <audio> tags).

html,css, and javascript -- or as the cool kids call the stack: html5 -- is more than enough

Use an open format and learn to love the bomb?

Districts probably aren't going to care, as they are looking for a cheaper way to stay current. I recognize the prices are not as good as they should be, but realize the logistics are removed from the situation. The monster of having to manage all those books goes away with a keypress, but lands them squarely on a treadmill with the publishers controlling the dial.

Open school books? Maybe teachers will collaborate and make their own material? There's a lot of room in there...

Fork Android?

What for? At this point, forking android would create something more proprietary than android itself.