The zone of proximal development is when a person can do something with the help of others, instead of doing it alone. If you want to know more information about the zone of proximal development then check out the website Psychology About.

This the distance between what a child can do on his own versus help from another person (an MKO perhaps).

zone of proximal

The zone of proximal development refers to the gap between a learner's current abilities and their potential development with guidance or support from a more skilled individual. Vygotsky believed that learning occurs within this zone, where learners can acquire new skills through collaboration and interaction with others who are more knowledgeable or experienced. In essence, the zone of proximal development highlights the importance of social interaction and scaffolding in learning and development.

claudal-rostal,

proximal distal <--i think