Author note — to cover

Unitless ratio scales such as 1 to 25000: convert map to ground and back, doing the unit change last, and choose sensible units for the answer. Shared territory with Ratio's scale work (R2); this page owns the map reading. Worded scales sit on Scale drawings. Both tiers. (G15, R2)

• Fluency — direct questions on map scales, 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).