Debug the Robot! (Unplugged Sequencing & Debugging Worksheet)

Teach students the essential skill of debugging with this engaging unplugged activity: Debug the Robot! Students follow robot movement instructions, identify errors (“bugs”), correct broken algorithms, and create their own buggy programs for a partner to debug. Perfect for Hour of Code, CS Ed Week, STEM classes, and any introduction to computational thinking.

No coding experience is required — students learn the foundations of algorithms, sequencing, loops, and debugging through hands-on practice and grid-based robot movement.

Highly interactive and perfect for middle school and high school!

⭐ What’s Included

✔ Mini-lesson: What is debugging?
✔ Vocabulary practice with word bank
✔ 8×8 robot grid (unplugged version)
✔ Algorithm #1: Debug a broken path
✔ Algorithm #2: Loop challenge with errors
✔ Rewrite corrections & fix-the-code sections
✔ Create-your-own buggy algorithm
✔ Partner debugging activity
✔ Reflection / exit ticket
✔ Teacher guide with pacing + differentiation
✔ Answer key for vocabulary + debugging examples
✔ Print-and-go PDF layout

⭐ Why Teachers Love This Resource

• 100% unplugged — no devices needed
  
• Covers key CS concepts: sequencing, loops, debugging
  
• Works great as a warmup, sub plan, or standalone lesson
  
• High engagement for MS/HS students (they love robot activities)
  
• Builds real computational thinking skills with zero coding required
  

⭐ Perfect For

• Hour of Code
  
• CS Ed Week
  
• Computer Science fundamentals
  
• STEM classes
  
• Logic + problem-solving units
  
• Makerspace or enrichment activities
  
• Advisory / homeroom
  
• Sub plans
  

⭐ Standards Alignment

• CSTA: Algorithms & Programming (Sequencing, Conditionals, Loops, Debugging)
  
• ISTE: Computational Thinking
  
• Mathematical Practices: Reasoning & Problem Solving