I thought his proposal was really interesting: Assume we standardize a taxonomy of concepts, each concept being like a “stage” in a computer game. You can thin

I thought his proposal was really interesting: Assume we standardize a taxonomy of concepts, each concept being like a “stage” in a computer game. You can think of the planets in the khan-academy galaxy. I can’t find the link right now, but I know of a company that had a complete knowledge graph and always scheduled the quiz questions so that you would be practicing on topics which you didn’t know but you had all the prerequisites for. So assume we have this bunch of “stages” to clear and to clear a stage you have to pass a bunch of difficult exercises which require the use of that concept. The student profile should show the grade as a triple (w, m, y), where w is the number of stages I cleared in the last seven days, m is how many stages I cleared in the last 30 days, and y is how many I cleared in the last year. This is analogous to how the UNIX command top reports CPU load averages. While concepts are highly interwoven at higher stages, I don't see why this wouldn't work up to a generation or two ago, which very roughly corresponds to undergraduate studies in fields like mathematics.