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The school think is what I'm thinking-- I used to teach and believe me, you wouldn't believe what text books cost for a primary or secondary level school-- which is why often students had "current events" texts that were ten years old.
BUT... they ahve to be cheap, and durable. If you give a block of granite to a sixth grader, and turn your back, you'll turn back around to find him looking proud of himself with a pile of granite dust.
Also, IP would be a problem, but not much of one-- schools are generally big enough targets that we don't have to worry about them trying to get in under the wire, and the units would probably be kept on the school grounds.
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