When my daughter got a Chromebook at her school, I went out and bought the same model for myself - Acer C740.
I read that (compared to the C720) the C740 model was more aimed at the "educational" market, and so had things like more durable hinges, thicker plastic, etc. It was designed to survive falls and abuse.
Besides all that, I fount the thing dead-simple to work on. The top pops apart, held together by plastic clips. I was easily able to replace the basic TN display with a vivid IPS display. The bottom is held together by a few screws. You can easily remove it and service the insides. The internals are user replaceable, such as the SSD (M.2), the fan, logic board, and battery. In fact, I yanked its original SSD and slapped in a 256 GB one.
They are so user-serviceable that they actually have the students themselves provide repairs. They take broken systems to a room where the kids salvage parts from them to repair and rebuild other damaged systems brought in.
The cost? Well, I paid $249 for mine. I'm sure the school got some sort of bulk discount ($199?). For that price they received:
* durable *and* easy-to-repair hardware, with a "clamshell" design that protects its display.
* a built-in pointing device and full keyboard.
* a full "Desktop" experience browser, with support for plugins and Flash.
* something that can easily sit on a desk and be used, without someone needing to constantly hold it.
* a locked-down, secure, automatic-updating OS with a seamless and quick "A/B" update system (iOS doesn't even have that).
In contrast, for a higher price, Apple is offering something that:
* must be held at all times to be used
* is much, much easier to be broken/damaged
* is much, much harder to work on or repair (students can't do it, teachers can't do it, it must be sent off)
* includes no keyboard or pointing device. each requires a separate purchase on top of the already-higher base price.
* has a relatively lengthy update process and cannot be used during
I don't think the newest "iPad for Education!" thing they are attempting will be enough to fight off Chromebook.