Author note — to cover

Find the median of a list: order first, middle value for odd counts, midpoint of the middle pair for even counts, with the halfway position rule made explicit. Ungrouped lists only; frequency tables and grouped data have their own pages, and quartiles are Higher on the Quartiles pages. Both tiers. (S4)

• Fluency — direct questions on the median, 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).