Author note — to cover

Cover reading distance-time graphs: speed as the gradient of each straight section, horizontal meaning stationary, comparing steepness across sections, return journeys, and whole-journey average speed. Straight-line sections only; curved graphs need Higher's chord and tangent pages, and drawing or interpreting general real-life graphs is shared with Algebra. Both tiers. (R14, R11)

• Fluency — direct questions on speed from a distance–time graph, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).