Author note — to cover

Cube roots of perfect cubes including negatives like the cube root of -27, and higher roots such as the fifth root of 32, as inverses of powers; calculator root keys. Fractional-index notation for roots is Higher, on unit-fractional-indices; estimation lives on Measures. Both tiers. (N6, N7)

• Fluency — direct questions on cube roots and higher roots, 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).