Helping Students Debug

	≠ debugging student code

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I Use Loud Cheering!

Identify
Understand
Locate
Change

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I Use Loud Cheering!

Identify
	“What's wrong?”
	“How do you know it doesn't work?”

	Design (turn off computer)
	vs
	Implementation (help with code)

Understand
Locate
Change

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I Use Loud Cheering!

Identify
Understand
	Goal: are they ready for debugging?
	
	Intro: “what does x store?”
		 “which is first confusing line?”
	Adv:	“where is concept X?”
		“what does this messy bit do?”
	
Locate
Change

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I Use Loud Cheering!

Identify
Understand
Locate
	1. Pick a point
	2. What should happen there?
	3. What does happen there?
	4. Pick a new point and repeat
Change

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I Use Loud Cheering!

Identify
Understand
Locate
Change
	1. local
	2. missing component
	3. aliased meaning
	
	Refactor 2 & 3 into 1
	Small steps, test often

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Helping Students Debug

I Use Loud Cheering!

Identify
	Ask what's wrong
	Design vs Implementation
Understand
	Ask what code does
Locate
	1. Pick point
	2. What should it do?
	3. What does it do?
Change
	- Local
	- Missing component
	- Aliased meaning
	Refector before fix
	Test often