"He set himself certain tasks in his education, and he calculated that he couldn’t give up nearly seven hours per day—the national average—to phones and other s

"He set himself certain tasks in his education, and he calculated that he couldn’t give up nearly seven hours per day—the national average—to phones and other screens." That's exactly what you get in middle school these days - 5 or so hours of Chrome book use at school followed by 1-2 hours of homework in it.