Author note — to cover

Why any non-zero base to the power zero is 1, read off the division law and the dividing-down pattern; evaluating mixtures like 7 to the 0 times 5 cubed. Zero to the zero stays out of scope; negative indices follow on the sibling page. Both tiers. (N7)

• Fluency — direct questions on the zero index, 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).