TBH the problem is not the iPad here.

An offline iPad with a limited set of educational apps/books would be a good classroom aid

Of course, an iPad without those limits is bad

Are you certain about that being "good"?

It is not just about what you can access.

The biggest problem is you get conditioned to instant and constant dopamine hits, which works directly against a lot of the things one is supposed to learn in school.

Kids learn the A-Z in record speed in 1st grade. But they don't learn to concentrate or that learning things can sometimes be challenging and the value of perseverance and that understanding eventually comes.

So in later grades they pay for learning the A-Z too fast through the iPad. Because they didn't learn how to learn.

The net effect in Norwegian classrooms over past 5 years of iPad education seems to be negative and it is not about what kids are exposed to. It is about not learning to concentrate.