Zone of Proximal Development
ZPD is defined by Vygotsky (1978) as “the distance between the actual developmental level as determined by independent problem solving and the level of potential development as determined through problem solving under adult guidance or in collaboration with more capable peers”
https://www.sciencedirect.com/topics/psychology/zone-of-proximal-development
https://www.simplypsychology.org/Zone-of-Proximal-Development.html
https://en.wikipedia.org/wiki/Zone_of_proximal_development
https://www.verywellmind.com/what-is-the-zone-of-proximal-development-2796034
https://www.open.edu/openlearn/languages/understanding-language-and-learning/content-section-6