The Revolution Will Be Kuhnian.
Not publishing.
In law school, I was one of the last hold outs using pen and paper to take notes. I told folks that I thought it helped me learn. I was right.
To be a good journalist in the post-war era, you need to be "objective" and report both sides to every story. But journalists and the world they cover are one system that feeds back on itself. The requirement of objectivity doesn't just shape journalism, it also shapes politics.
So in a semi-scientific field like psychology, class number three is when students learn about field research. Meanwhile, in economics, class three is when students learn to build thought experiments where one simply assumes one knows how people behave. The thought experiments generate graphs, and from there it's off to the equations.
Perhaps most damning, by class 3, DeLong's students are already doing problem sets! That means they are literally coming up with the "textbook economic answers" before looking at the world.