Study a worked example before attempting to solve a similar problem

Reading a fully solved example builds schema faster and with less wasted cognitive load than jumping straight to problem-solving.

Why it works

When a novice attempts to solve a problem without a schema, most working memory goes to means-end analysis (backtracking, testing moves) rather than understanding. A worked example keeps the solution path in view so the learner can allocate full capacity to understanding why each step follows from the previous one — the schema-building work — instead of computing what to do next. The worked-example effect (superior schema formation from examples vs. unsupported problem-solving) is one of CLT’s most replicated findings.

How to do it

1. Before attempting a new problem type, find or construct a fully worked example.
2. Work through the example step by step, explaining to yourself why each step is taken (self-explanation).
3. Attempt a problem of the same type immediately after, while the example’s structure is still active.
4. Reduce example support progressively as problems become fluent (fading technique).

Evidence

The worked-example effect is one of the most robust findings in cognitive load and instructional design research, with dozens of experimental studies showing novices learn more from examples than from equivalent time spent on unsupported problem-solving. Sweller & Cooper (1985) first demonstrated this in algebra, where studying worked examples produced faster, more accurate later problem-solving than conventional practice. (rct)

The effect reverses for experts (the "expertise reversal effect"): worked examples for someone who already has the relevant schema impose more load than just solving the problem.

Sources

• Sweller & Cooper (1985), The use of worked examples as a substitute for problem solving, Cognition and Instruction
• Atkinson et al. (2000), Learning from examples, Journal of Educational Psychology
• Sweller, J., & Cooper, G. A. (1985). The use of worked examples as a substitute for problem solving in learning algebra. Cognition and Instruction, 2(1), 59–89.
• Atkinson, R. K., Derry, S. J., Renkl, A., & Wortham, D. (2000). Learning from examples: Instructional principles from the worked examples research. Review of Educational Research, 70(2), 181–214.

Common mistake

Reading through a worked example passively without self-explaining each step, which gives the illusion of understanding but leaves the underlying schema unbuilt.