Technologies · Year 8

Active learning ideas

Testing and Debugging Strategies

Active learning works well for testing and debugging because real errors rarely appear on paper. Students need hands-on practice running, breaking, and fixing code to grasp how errors hide in logic and inputs. Collaborative activities turn abstract debugging into a shared, visible process students can discuss and improve together.

• ACARA Content Descriptions
• AC9TDI8P09

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Problem-Based Learning
• 30 min · Pairs

Pair Debug Relay: Error Hunt

Pairs receive buggy code snippets with one of three error types. One student tests and describes the issue while the partner fixes it, then they swap roles. Repeat with three snippets, logging fixes in a shared doc.

Analyze the importance of thorough testing in creating reliable software.

Facilitation Tip

During Pair Debug Relay, rotate pairs every 5 minutes so students experience multiple error patterns and debugging styles quickly.

What to look for

Present students with three short code snippets, each containing a different type of error (syntax, runtime, logic). Ask them to identify the type of error in each snippet and briefly explain why they classified it that way.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management
• Relationship Skills

Activity 02

• Stations Rotation
• 45 min · Small Groups

Stations Rotation: Test Case Builder

Set up stations for syntax, runtime, and logic tests. Small groups create and run test cases on sample programs, then evaluate peers' tests for completeness. Rotate every 10 minutes and share strongest tests class-wide.

Differentiate between different types of errors (syntax, runtime, logic) and how to find them.

Facilitation Tip

In Station Rotation, place error examples on separate cards so students physically move between syntax, runtime, and logic challenges.

What to look for

Provide students with a simple program that has a logic error. Ask them to write down two test cases they would use to find the error and one debugging step they would take to investigate.

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Activity 03

• Problem-Based Learning
• 35 min · Whole Class

Whole Class Bug Bounty

Display a class program on the board with hidden bugs. Students individually propose test cases via sticky notes, vote on best ones, then run them together to debug step-by-step.

Construct a series of test cases to verify the functionality of a program.

Facilitation Tip

For Whole Class Bug Bounty, assign roles like tester, debugger, and recorder to keep every student accountable during the hunt.

What to look for

Students exchange a small program they have written. Each student acts as a tester for their partner's code, documenting at least two test cases and one potential bug they found. They then return the feedback to the original programmer.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management
• Relationship Skills

Activity 04

• Problem-Based Learning
• 25 min · Individual

Individual Debug Journal

Students code a simple program, then self-test with a checklist for error types. They journal failures, fixes, and reflections before peer review.

Analyze the importance of thorough testing in creating reliable software.

Facilitation Tip

In Individual Debug Journal, require students to use a consistent format: error, test case, fix, and verification step.

What to look for

Present students with three short code snippets, each containing a different type of error (syntax, runtime, logic). Ask them to identify the type of error in each snippet and briefly explain why they classified it that way.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management
• Relationship Skills

A few notes on teaching this unit

Teach debugging as a cycle: write a small piece of code, test it, fix it, then test again. Avoid letting students skip the test step—many students think coding ends when the program runs, not when it works correctly. Research shows that students who write tests first (test-driven development) catch errors earlier and make fewer last-minute fixes. Model your own debugging aloud so students see your thought process when inputs don’t match outputs.

Students will move from guessing at errors to following clear steps: identifying the error type, writing targeted tests, and documenting fixes. You’ll see them refer to test cases before changing code and use tools like print statements or breakpoints with purpose. Their conversations will shift from ‘It’s broken’ to ‘Here’s what went wrong and how to prove it’s fixed.’

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Watch Out for These Misconceptions

• During Whole Class Bug Bounty, students might believe one successful test run proves the program is error-free. Halt the hunt by asking, ‘What inputs haven’t we tried yet?’ to push for comprehensive testing.

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Methods used in this brief

• Problem-Based Learning
• Stations Rotation