Reasoning: Chain of Thought

4 min
Audience
ages 10–15
Time
20 to 30 min
Module
2/5
Badge to earn
Show-Your-Work Champion

Today's mission

By the end of this lesson, you will be able to explain what chain of thought is, why working step by step makes answers more reliable, and spot where a chain of steps went wrong.

The idea in one picture

In math class, your teacher says, "Show your work," not just "write the final number." At first it feels slower. But when you write each step, two great things happen: hard problems become a series of easy ones, and if you make a mistake, you (or your teacher) can find exactly where it happened instead of just seeing a wrong answer. An AI model gets the same benefits. When it writes out its reasoning one step at a time before answering, it makes fewer careless errors, and humans can check each step.

Preview — the rest of the lesson is for enrolled readers.

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This lesson is part of the “Reasoning, planning, remembering” module

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