What you say is very insteresting and I have considered also after studying to teach. The teacher has to deal with children that are already made, mentally of course, so that means they have as much attention as they have at home. Economic crisis on the rise, people have to work more, are more worried and don't have the space of mind to play with their children so they rely on screen to keep them pacified.
With mental health issues on the rise, that means even little space of mind, and if they consume screens their emotions gets supressed, making their emotional centers even stronger and as such, their worries. People are easy to manipulate when they are afraid, which pretty much explains our leader election lately. Makes everything short term exciting and long term painful. Easy, pleasure, will shape the future of humankind. So yeah, we might be screwed.
I have researched the subject a little bit, applied many, for I was like one of these children and I think the answer is strenghtening the pre frontal cortex. I am developing the subject right now as I believe knowing about it as well as debating about it might save our species.
Unfortunately I did not finish my college because at some point I realized being a history teacher in a corrupt country (Venezuela) would have ment to say what they wanted me to say.
A lot of what shapes a child's brain is learned in the first three years of development. Yet, what parents are doing now is putting kids on a screen to keep them quiet. And they are learning how to be passive consumers, instead of active explorers.
This leads straight into the mental health issues, doesn't it? They are conditioned to be hyper aware of their emotions and reactive, rather than reflective.
A history teach in a corrupt country... doesn't sound like fun.