Author note — to cover

Read the minimum or maximum point from a drawn quadratic graph, using symmetry to place it halfway between the roots, and interpret it in context as a greatest or least value. Both tiers for graphical reading — finding it algebraically by completing the square is the Higher sibling. (A11)

• Fluency — direct questions on turning points on a quadratic graph, 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).