My kids have both iPads and school issued Chromebooks. They hate the chromebooks, only using them for homework. They call them "CrummyBooks." The build quality is terrible, battery life is terrible, and to my kids, they're locked down way too much (some of this might simply be the wifi restrictions/filtering at school).
Initially our school district planned iPads, but backtracked over cost. We were initially excited for them, so that our kids wouldn't have to carry so many heavy textbooks. But the quality of the textbooks on the Chromebook are terrible. It's as if the publishers simply took galley proofs and dumped them into a pdf.