In the Rigior-Relevance Model, Quadrant D thinking shows a high level of real life and higher order thinking skills. Dr. Willard Daggett reckons that 21st Century skills involve functioning at a high level of thinking. Since Dr. Daggett is an educational reformer, his theories often face Resistance. His model calls for collaborative skills. I was wondering if economists have been teaching this since John Nash postulated game theory.
If game theory is Quad D thinking, then that's high justification for teaching the rigor-relevance model.