The Zone of Proximal Development (ZPD) was a key construct in Lev Vygotsky’s theory
of learning and development. Vygotsky is known for his sociocultural theory, which
suggests that cognitive development is a result of social interactions and these
interactions can differ from one culture to the next.
The Zone of Proximal Development is defined as the space between what a learner can
do without assistance and what a learner can do with adult guidance or in
collaboration with more capable peers.
Stages of the Zone of Proximal Development
There are three distinct categories where a learner may fall in terms of their skill set.
For learning to take place, it's critical that the expert understands the learner's specific
ZPD stage.
1) Tasks a Learner Cannot Accomplish With Assistance
Tasks that are outside of the learner's ZPD are those that are unable to be completed
even with the help of an expert.
2) Tasks a Learner Can Accomplish With Assistance
When a learner is close to mastering a skill set required to complete a task but still
needs the guidance of an expert to do so, they are considered to be in their zone of
proximal development.
In this situation, an expert may use various techniques to help the learner better
understand the concepts and skills required to perform a task on their own.2
3) Tasks a Learner Can Accomplish Without Assistance
In this phase, the learner is able to complete tasks independently and has mastered
the skill set required to do so. The learner does not need the help of an expert.
When a learner has reached this stage, the expert may increase the task difficulty level
in order to find the learner's next ZPD and encourage further learning.
Key Components of the Zone of Proximal Development
There are several core concepts developed by Vygotsky and expanded upon by others
following him that have helped round out this learning theory.
★ The success of this learning process involves these key components:
  ● The presence of someone with the knowledge and skills to guide the learner
  ● Supportive activities, known as scaffolding, provided by the expert that help
      guide the learner
  ● Social interactions that allow the learner to work on their skills and abilities
★ The "More Knowledgeable Other"
  The "more knowledgeable other" is someone who has a higher level of knowledge
  than the learner and is able to provide them with instruction during their learning
   process.While a child might not yet be capable of doing something on their own,
   they are able to perform the task with the assistance of a skilled instructor, which
   may include a parent, a teacher, another adult, or a peer.
★ Scaffolding
   Activities, instructions, tools, and resources that are used to aid in this learning
   process are known as scaffolding.
   Scaffolding consists of the activities provided by the educator, or more competent
   peer, to support the student as he or she is led through the zone of proximal
   development.
   Eventually, scaffolding can be removed and the student will be able to complete
    the task independently.
★ Social Interaction
   For learning to take place, Vygotsky believed that social interaction between a
   more knowledgeable other and the learner was critical. While the expert may be an
   adult, Vygotsky also emphasized the power of peer learning.
   For instance, when kids are learning a new concept, social interaction between the
   adult expert and all of the children is initially crucial. But, if some children grasp
   the concept, while others are still in their ZPD, peer interaction may create the
   most conducive environment for learning.
Vygotsky believes the role of education is to provide children with experiences which
are in their ZPD, thereby encouraging and advancing their individual learning.