I worked for California schools for 4 years as a technical consultant. It hurts me deeply to say, especially since my first son is just starting Kindergarten, that these schools really are going to go with whatever is recommended to them at the highest corporate/political level. I helped bring LTSP and thus Linux to thousands of elementary school kids over this period as a pilot (and after successful pilot, transition from aging Windows PCs in media/computer labs) in 7 schools. It felt so amazing for me to have the honor of exposing this many children to open source software. But, after the acting technoogy director retired, a new one stepped in and quickly pulled the plug on the whole setup, reverting back to Windows.
It's the same at deeply rooted non-profits for kids. I worked for Boys & Girls Clubs in California, doing the same thing - in addition to LTSP, though, we also had Linux on the back-end fileserver and firewall. It was a great setup. Then, we heard that Microsoft suddenly (and unexpectedly) had given them a grant for new PCs, on the condition that Windows was the only OS installed, and they essentially weren't allowed to "tinker" with them.
The RIAA and MPAA are very large and rich corporations. They have that much money to throw at conditioning young children that software is something that comes with many restrictions and cannot be shared freely, modified or "tinkered" with. Schools will go along with it as long as there's a benefit for them. The moral standing of the people at the top of the education system's pyramid aren't exactly the best, from what I've experienced, and I'm sure many of them have very close ties with other "industry" executives. Scratch my back, I'll scratch yours. Makes me think of "National Lampoon's Senior Trip". Ha!