Teacher guide · Think Lab · Medium · about 30 min
🔢 Logic Grid Puzzle
Pupils practise problem solving through "Logic Grid Puzzle": Classic deduction from a set of clues.
Lesson guide
1. Hook · 5 min
Show the 🔢 mission title and read the opening: "Three friends, three pets. Read every clue.". Take three quick guesses.
2. Model · 5 min
Think aloud through the first step together. Use Cog the Owl's line as your prompt: "Good thinking. Show me the why."
3. Do · 10 min
Pairs work through the 3 steps on screen or on the printed sheet. Circulate and ask "why?"
4. Discuss · 10 min
Use two or three of the discussion questions. Ask pairs to share different answers, not just correct ones.
5. Reflect · 5 min
Exit ticket: one sentence on how they used problem solving today.
Discussion questions
- What was the hardest choice in "Logic Grid Puzzle", and why?
- Who owns the cat — explain your reasoning to a partner.
- What does Ada own — explain your reasoning to a partner.
- Where could you use problem solving outside school this week?
- If you did this again, what would you change?
Adapting it
Support: Read prompts aloud, pair with a confident partner, and accept spoken or drawn answers for writing steps.
Stretch: Set the Challenge tier (1 extra steps) and ask pupils to justify every answer in writing.
Curriculum links
- National Curriculum: Maths: reasoning mathematically and problem solving
- National Curriculum: Computing: logical reasoning and algorithms
- PSHE: Living in the wider world: making decisions and evaluating choices
Pupil sheet
🔢 Logic Grid Puzzle
Name: ____________________ Date: __________
1. Three friends, three pets. Read every clue.
Clue — Clue 1: Ada does not own the cat.
Clue — Clue 2: Ben's pet has feathers.
Clue — Clue 3: Cara owns the cat or the dog.
2. Who owns the cat?
☐ Ada
☐ Ben
☐ Cara
3. What does Ada own?
☐ Dog
☐ Cat
☐ Bird