Dot and Pip test their estimate · Ages 4–7

A Pattern with One Mistake

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• Ages 4–7
• 32-page softcover

Five bunting rows must repeat red-blue and grow by one pair at a time. Dot and Pip hunt, group and check every pennant before the Pattern Party begins. Their estimate is wrong. One colour is wrong too. But the rats' evidence shows exactly how to save the pattern and the party. A warm mathematical story about estimating, organising evidence, repeating units and growing rules. A Pattern with One Mistake turns repeating and growing patterns into the central problem: The rats make a confident estimate, then collect and organise evidence to test it; their estimate is wrong but their method saves the event. A final spread replays the story with manipulatives, a labelled visual model, and one open question with multiple defensible answers.