The Zone of Proximal Development and Scaffolding, Explained

Two ideas sit behind a great deal of everyday teaching talk: the “zone of proximal development” and “scaffolding”. They are often treated as one idea with two names. They come from different people, decades apart, and knowing the difference helps you use both well.

Vygotsky and the zone of proximal development

Lev Vygotsky was a Soviet psychologist who died in 1934, aged 37. Much of his work reached English-speaking readers only decades later. The best-known collection, Mind in Society (1978), was edited by Michael Cole and colleagues from several of his writings.

Vygotsky’s central claim was that higher mental functions, such as deliberate memory, planning and reasoning in words, develop first between people and only later within the individual. A child first solves a problem in conversation with an adult, then gradually takes over the adult’s role in their own thinking.

From this he drew a point about assessment. A test of what a child can do alone shows only functions that have already matured. In Mind in Society he defined the zone of proximal development 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.”

Two children who score the same on an independent test might differ a great deal in how far they can go with help. Vygotsky argued that this second measure tells a teacher more about what to teach next.

A note of caution

Seth Chaiklin (2003), in a careful reading of Vygotsky’s texts, argues that the concept was more precise and more developed than its popular version. In everyday use the ZPD has become shorthand for “work that is a bit too hard to do alone”. That is a useful rule of thumb, but Vygotsky was writing about the maturing of whole psychological functions across childhood, not about the difficulty level of a single worksheet. It is fair to borrow the idea for lesson planning, as long as we remember we are simplifying it.

Where “scaffolding” came from

Vygotsky never used the word scaffolding. It comes from a 1976 paper by David Wood, Jerome Bruner and Gail Ross, “The role of tutoring in problem solving”, in the Journal of Child Psychology and Psychiatry.

In that study, a tutor worked one to one with thirty children aged three, four and five, helping each to build a pyramid from 21 interlocking wooden blocks. The tutor tried to let each child do as much as possible alone, starting with spoken suggestions and stepping in physically only when needed. The younger children needed far more help: about 10% of the three-year-olds’ constructions were unassisted, compared with half for the four-year-olds and three-quarters for the five-year-olds.

From watching the tutor, Wood and colleagues described what effective help did. In paraphrase, the tutor:

• got the child interested in the task
• simplified it so the child could manage parts of it
• kept the child heading towards the goal
• pointed out the features that mattered, such as where the child’s attempt differed from a correct one
• managed frustration so the child did not give up
• demonstrated a solution for the child to imitate

The metaphor fits: a temporary structure that lets a builder reach what they could not reach alone, and that comes down once the building can stand.

Wood’s later work turned this into a simple working rule, often called contingent tutoring: if the child succeeds, give less help next time; if the child struggles, give more. The help depends on what the child has just done, not on a script decided in advance.

What good scaffolding looks like now

Janneke van de Pol, Monique Volman and Jos Beishuizen (2010) reviewed a decade of classroom research on scaffolding. They identified three features that run through the literature:

1. Contingency means support is adjusted to the learner’s current understanding. That needs diagnosis first: you cannot pitch help well without finding out what the child already knows.
2. Fading means support is reduced as the learner becomes more competent.
3. Transfer of responsibility means control of the task, including the thinking and the motivation, passes gradually to the learner.

They also noted that research on whether scaffolding improves learning was still limited, mainly because it is hard to measure contingent teaching in a busy classroom. The principle is well supported by theory and by small studies; the precise classroom effects are less certain than the term’s popularity suggests.

Scaffolding versus simply helping

Much of what gets called scaffolding in schools is support that never comes down. A writing frame used for every piece of work all year, or a teaching assistant who sits beside the same pupil in every lesson and rephrases every instruction, may help the child finish the task. Without a plan to fade, though, it can also stop the child ever doing the task alone.

This matters especially for pupils with SEND. Adult support is often essential, and some pupils will need it in some form throughout school. The question to keep asking is which parts of the support can be handed over, and when.

Practical ideas for the classroom

• Find out before you help. Ask the pupil to show you where they are stuck, or to explain their thinking so far. A quick “talk me through it” often reveals that the gap is smaller, or different, from what you assumed.
• Start with the lightest help. A prompt (“What did we do in the first example?”) before a hint, a hint before a demonstration. If a light prompt works, the child keeps more of the thinking.
• Plan the fade. If you introduce a sentence starter or a worked example, decide when you will remove part of it. Many teachers move from a full model, to a partly completed one, to a blank page.
• Say out loud what you are handing over: “Last week I chose the method. Today you choose, and I’ll check.”
• Use peers. Vygotsky’s definition includes “more capable peers”. Structured paired work, where one pupil explains to another, can provide support without an adult in the middle.

At home

Parents scaffold all the time without the vocabulary: holding the back of the bike seat, then letting go; reading a page and letting the child read the next; doing the first sum of the homework together.

• Wait a few seconds before stepping in. Children often need thinking time more than help.
• Ask a question rather than giving the answer: “What could you try first?”
• Notice success and hand over more next time. If your child managed the first half of the recipe, let them read the second half to you.
• Expect support to go back up when a task gets harder or your child is tired. Contingent help moves in both directions.

Further reading

• Chaiklin, S. (2003). The zone of proximal development in Vygotsky’s analysis of learning and instruction. In A. Kozulin, B. Gindis, V. S. Ageyev and S. M. Miller (eds), Vygotsky’s Educational Theory in Cultural Context (pp. 39-64). Cambridge University Press.
• Van de Pol, J., Volman, M. and Beishuizen, J. (2010). Scaffolding in teacher-student interaction: a decade of research. Educational Psychology Review, 22, 271-296.
• Vygotsky, L. S. (1978). Mind in Society: The Development of Higher Psychological Processes. Harvard University Press.
• Wood, D., Bruner, J. S. and Ross, G. (1976). The role of tutoring in problem solving. Journal of Child Psychology and Psychiatry, 17(2), 89-100.