This will be a central place for resources about QQ reasoning.  This will develop over time, but at present there are existing slides and resources from the following two talks:

Qualitative–Quantitative Reasoning – Understanding and managing the behaviour of numeric phenomena. In Emergent Interaction Complexity, Dynamics, and Enaction in HCI, A CHI 2021 Workshop held online, 15th May, 2021

Qualitative–Quantitative Reasoning: thinking informally about formal things. Keynote at ICTAC 2021: 18th International Colloquium on Theoretical Aspects of Computing, Nazarbayev University, Nur-Sultan, Kazakhstan, September 6-10, 2021.