Coding puzzle · Logic & Puzzles
Debug the robot: find the wrong arrow · Grade 8
Each 17-step program has exactly one wrong arrow. Trace it on the 8-by-8 grid, find the bug, and draw the arrow that fixes it so every gem is collected. Practices debugging.
- Grade 8 · ages 13 to 14
- Hard
- 5 to 10 minutes
- 1 page
- Free
The answer key is a separate page for grown-ups. Sign in to download it.
What the sheet says
Directions: Each program has exactly one wrong arrow. Follow it with your finger, find the wrong step and draw the arrow that fixes it.
- up · right · down · left · start · goal · gem · wall
- One arrow is wrong. Find it and fix it so the robot collects every gem and reaches the goal.
What your child practices
Your child practices debugging. The skill is “State and sequencing”: plan a sequence of moves to reach a goal.
- Grades and ages
- Grade 8, ages 13 to 14
- Time
- About 5 to 10 minutes
- Subject
- Logic & Puzzles
- Level
- Hard for Grade 8
- Answer key
- Yes, for grown-ups who sign in
- Printing
- 1 page, US Letter or A4, low-ink option
- Updated
How to use it
Work through the first program together, one line or arrow at a time. Use a pencil so changes are easy to make. It is one of the harder sheets for Grade 8, best once the basics of the skill are secure.
An answer key comes with it as a separate page that grown-ups download after signing in.
Tip for grown-ups: Let your child move a coin or finger square by square for each arrow.
Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.
Logic & Puzzles · Grade 8
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