Yes, but I think most people agree that “screens” means students on tablets or laptops. So, yes, a teacher can show a Mark Rober science explanation on the Smartboard with no issue. But when that same video is assigned to students on their laptops, most students most of the time don’t watch and complete the associated assignment in a meaningful way. They split their attention across multiple tasks: open other tabs, take breaks to watch game highlights, listen to music, etc. It is rare to see a teacher control students’ attention when they have laptops or tablets in front of them when it’s not a test situation. Most teachers I know hate using computers in class for this very reason. The student work suffers, the kids fuck around, you’re constantly telling someone to get back to work, it’s annoying.

So I take your point, but, I’m sorry, it IS the screen itself that contaminates the learning environment.