Scaffolding
Scaffolding is the temporary, calibrated support that enables a learner to perform a task they could not yet manage alone. The metaphor comes from Wood, Bruner, and Ross (1976), who used it to describe parent-child tutoring, and it was later integrated with Vygotsky's Zone of Proximal Development to become a foundational concept in sociocultural approaches to teaching.
The Original Six Functions
Wood, Bruner, and Ross identified six things a tutor does when scaffolding a problem-solving task:
| Function | What the tutor does |
|---|---|
| Recruitment | Engages the learner's interest in the task |
| Reduction in degrees of freedom | Simplifies the task by limiting choices or chunks |
| Direction maintenance | Keeps the learner pursuing the goal when motivation flags |
| Marking critical features | Highlights discrepancies between the learner's attempt and the target |
| Frustration control | Manages affect so the learner doesn't disengage |
| Demonstration | Models a completed or partially completed solution |
The list still organizes most contemporary discussions of teacher scaffolding, classroom or otherwise.
Defining Properties
What distinguishes scaffolding from generic "help":
- Contingent: tuned to the learner's current performance, not delivered as a fixed plan
- Graduated: only as much support as needed, never more
- Temporary: designed to be withdrawn (sometimes called fading) as competence grows
- Transferable: aimed at internalization, so the learner can later perform the task independently
If support stays static, or never withdraws, it is not scaffolding. It is dependency.
Scaffolding and the ZPD
Scaffolding is the operational counterpart to the Zone of Proximal Development. The ZPD defines what the learner can achieve with help; scaffolding describes how that help is structured. The two concepts are now so tightly bound that "scaffolding within the ZPD" has become a single conceptual unit in sociocultural SLA.
A practical implication: scaffolding aimed at tasks well below the ZPD is wasted (the learner doesn't need it); aimed at tasks beyond the ZPD it fails (no amount of support produces success). Calibration to the actual ZPD is the skill.
Forms of Scaffolding in ELT
Scaffolding shows up in many guises across language teaching:
- Linguistic scaffolds: sentence frames, model paragraphs, lexical sets, partial utterances to complete
- Cognitive scaffolds: graphic organizers, planning templates, brainstorm prompts, structured outlines
- Metacognitive scaffolds: rubrics, self-assessment checklists, planning-monitoring-reviewing routines
- Procedural scaffolds: task sequencing, staged complexity (e.g., dictogloss building from listening to reconstruction)
- Interactional scaffolds: teacher recasts, elicitation, corrective feedback, and pair groupings that pair stronger with weaker learners
- Material scaffolds: glossed texts, audio with transcripts, input-enhanced readings, video with subtitles
The same task can be scaffolded at multiple levels simultaneously: a writing task might combine a sentence frame (linguistic), a planning template (cognitive), and peer review (interactional).
Scaffolding vs Comprehensible Input
The two are related but distinct. Comprehensible input is a property of what the learner receives; scaffolding is a property of how learning is supported across a task. CI focuses on input level (i+1); scaffolding addresses the full performance loop: input, processing, production, revision.
Hard Versus Soft Scaffolding
A useful distinction from Saye & Brush (2002):
- Hard scaffolds are pre-planned, embedded in materials (worksheets, sentence stems, model texts)
- Soft scaffolds are dynamic, in-the-moment teacher responses (prompts, hints, gestures, recasts)
Effective teaching uses both: hard scaffolds provide consistent floor-level support; soft scaffolds adapt to what surfaces during the task.
Fading and Transfer of Responsibility
The scaffolding metaphor is most often misapplied by leaving scaffolds permanently in place. The pedagogical move is transfer of responsibility: the teacher progressively withdraws support as the learner internalizes the strategies and structures the scaffold made visible. Scaffolding without fading produces learners who can perform the task only with the prop, never autonomously.
Criticisms and Refinements
- Vague usage: "scaffolding" is now applied so loosely that any teacher support is called scaffolding, diluting the concept (Pea 2004).
- Asymmetric origins: the original metaphor assumes a more capable other directing a less capable one. Peer scaffolding and collective scaffolding (Donato 1994) extend the concept to symmetrical interaction where learners co-construct support.
- Cultural specificity: the directive nature of the original Wood/Bruner/Ross model reflects Western tutoring norms; scaffolding plays out differently in cultures with different teacher-learner role expectations.
- Risk of over-support: heavy scaffolding can suppress productive struggle and the noticing that comes with it (links back to the pushed output argument).
References
- Wood, D., Bruner, J., & Ross, G. (1976). The role of tutoring in problem solving. Journal of Child Psychology and Psychiatry, 17(2), 89–100.
- Donato, R. (1994). Collective scaffolding in second language learning. In J. Lantolf & G. Appel (Eds.), Vygotskian Approaches to Second Language Research. Ablex.
- Saye, J. & Brush, T. (2002). Scaffolding critical reasoning about history and social issues in multimedia-supported learning environments. Educational Technology Research and Development, 50(3), 77–96.
- Pea, R. (2004). The social and technological dimensions of scaffolding and related theoretical concepts for learning, education, and human activity. Journal of the Learning Sciences, 13(3), 423–451.
- van Lier, L. (1996). Interaction in the Language Curriculum: Awareness, Autonomy, and Authenticity. Longman.