Without a good theory, all data can be equally usefull.
“As an educator, I’m painfully aware of the challenges of curricular design. Far and away the largest challenge in building a curriculum is fitting the quantity of material into a realistic course structure. It’s a zero-sum game; for each topic I add, I have to remove something. Design, like other professions, is going through a process of increased specialization, and that means there are more skills to learn in order to claim deep expertise. I end up agonizing over every detail, every class.”
