Author note — to cover

Cover scaling ingredient lists by integer, fractional and decimal factors such as 1.5 or 2/3, converting between serving counts both ways, and how-many-can-be-made questions limited by one ingredient. Fraction arithmetic assumed from Number. Value comparison is best-buy-comparisons; mixtures stated as ratios are Ratio's mixing-and-concentrations. Both tiers. (R5, R10)

• Fluency — direct questions on scaling a recipe, 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).