Author note — to cover

Keying multi-step expressions on a scientific calculator: bracketing fraction-bar numerators and denominators, powers, roots, negatives, the fraction key; reading the display back. Standard-form entry and exact-value toggling get sibling pages; how much to round lives on Measures choosing-accuracy. Both tiers. (N3, N14)

• Fluency — direct questions on entering a calculation on a calculator, 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).