Author note — to cover

Area as squares covered, counted on grids then computed as length times width, the square as special case, and a missing side recovered from a given area. Rectangle area is KS2 carry-over that the G16 formula list assumes. Compound rectilinear shapes wait for the composite page. Both tiers. (G16, G17)

• Fluency — direct questions on area of a rectangle, 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).