Author note — to cover

Name the unknown, translate the facts into a linear equation, solve it and check the answer against the story, in age, money and think-of-a-number contexts; answer the actual question asked, not just x. Geometric setups and quadratic outcomes are the sibling pages. Both tiers. (A21)

• Fluency — direct questions on forming an equation from words, 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).