Author note — to cover

Cover why 3x² squares first then multiplies by 3, so x = 4 gives 48 not 144, contrasting (3x)²; include cubes and mixed expressions like 2x² + x, and simple fractional inputs. Out of scope: index laws (simplifying group) and negative inputs (sibling page). Both tiers. (A2)

• Fluency — direct questions on substituting into terms with powers, 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).