Discussion
In order to help students to become good problem solvers, a teacher should emphasize on the practice of :
Answer: C
The teacher should emphasise breaking large complex problems into smaller manageable problems.
Breaking a problem into sub-goals is a general problem-solving heuristic (means-end analysis). Each smaller part is easier to understand and solve, and solving the parts in turn leads to a solution of the whole. Practising it helps children tackle unfamiliar problems systematically.
The other options are obstacles to problem solving. Attending only to information that confirms existing beliefs is confirmation bias. Approaching every problem in one fixed way is a mental set or functional fixedness. Centring on a single piece of information is centration, which makes a solver miss the other relevant features.
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