So here we have the goalposts shifting. First it was "the whole thing has been pumped full of epoxy" and "you don't repair these things, you replace them" and now we've evolved to "That is repairable by the standards of Apple computers, not the standards of open hardware."
The repair manuals are available online. You can order replacement parts directly from Apple. A new screen costs about $200 (I would also guess that schools get dramatically reduced prices to repair, but that's purely speculation). Yes, I get it, that doesn't meet your value proposition, but clearly a large number of school districts disagree with your financial analysis.
My kids have Chromebooks. On average they need about 3 repairs a year, and my kids ARE careful with their stuff. They are complete junk, terrible trackpads, terrible screens, terrible keyboards. I have not touched a Neo, but I would expect it to be substantially hardier, faster, and with a much better screen than the budget junk my kids are forced to use. Yes, that does come with a higher initial investment.