Author note — to cover

Construct and read time series graphs: readings at regular intervals plotted and joined, values and differences read off, and awareness that in-between points are only indicative. Both drawing and interpreting questions. Describing trend and season is the sibling page; moving averages are out, GCSE Statistics qualification not maths. Both tiers. (S2)

• Fluency — direct questions on time series graphs, 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).