A complete free reasoning-game lesson in which pupils choose and order whole-number steps, record a number trail and explain how it meets every rule. Includes a worked trail, practice, two game rounds, a solo option, an optional search challenge, teacher guidance and explained answers. Includes a 12-page complete A4 pack and a separate 6-page pupil extract; the same pupil pages appear in both files for convenient printing. British English. Suggested ages 9–11 (Years 5–6 in England), selected by prior knowledge. No national curriculum alignment or classroom validation is claimed. The teacher page links to Maths Strategy Club on TES as a relevant next step, followed by our TES shop. AI tools were used in developing the text and illustrations. Fablehall Studio — Thoughtfully crafted tools for learning.