Author note — to cover

Establish x, x² and x³ as unlike terms, then collect expressions mixing them, e.g. 4x² + 3x − x² + 5x, plus pairs like xy versus x. Out of scope: adding indices when multiplying, which is the multiplying-powers page, not collecting. Both tiers. (A4)

• Fluency — direct questions on like 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).