Grade 6 · Technology · Lesson 31

Refactor and Improve Code

Code that works is not the same as code that is good. The first time you solve a problem, your code is usually messy — long lines, weird names, copy-pasted blocks. Refactoring is the second pass: you keep the program doing exactly the same thing, but you change the shape of the code so a human can read it. Same behavior, better structure.

What this lesson teaches

1Define refactoring as changing the shape of code without changing what it does
2Spot common code smells like magic numbers, long functions, and duplicated logic
3Match each smell to the refactor that fixes it
4Rewrite a small messy block into a cleaner version using a named refactor

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