Are your students struggling to understand why their robot isn’t reacting correctly?

This hands-on Sensor Logic Errors – Debugging Worksheet challenges students to identify and fix common mistakes when programming sensors in LEGO SPIKE Prime.

Students test intentionally “broken” programs using the color, distance, touch (force), and gyro sensors. Instead of being told what is wrong, they must:

• Run the incorrect code
• Observe what the robot actually does
• Identify the logic error
• Adjust the code
• Test their fix
• Reflect on why their solution works

This activity goes beyond simple coding practice and teaches students how to think like engineers. Editable for easy classroom customization!

What’s Included:

✔ 4 debugging scenarios

• Color Sensor (reflected light threshold issues)
• Distance Sensor (backwards conditions & loop logic)
• Touch Sensor (incorrect sensor state)
• Gyro Sensor (equality vs threshold errors)
  

✔ Student observation and fix sections
✔ Clear multiple-choice logic error identification
✔ Teacher Notes with explanations and correct code examples
✔ Emphasis on real-world debugging and sensor placement

This lesson reinforces that sensors usually work — logic and setup are often the real issue.

This worksheet is also included in the LEGO SPIKE Prime Robotics Unit 2: Precision Driving, Sensors & Debugging (Weeks 3–4). Please check the bundle before purchasing to avoid duplicate purchases.

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