1. Battelle for Kids. (2019). Framework for 21st century learning. http://static.battelleforkids.org/documents/p21/P21_Framework_Brief.pdf
2. Center on the Developing Child. (n.d.). Serve and return. Harvard University. https://developingchild.harvard.edu/science/key-concepts/serve-and-return
3. Crowe, J. (2021, March 29). A long road to choice. Teaching for Artistic Behavior. https://teachingforartisticbehavior.org/2021/03/29/john-crowe-a-long-road-to-choice