Author note — to cover

Ordering and comparing values in standard form by power of ten first, then front number, with mixed lists containing ordinary numbers converted first; negative powers ordering counterintuitively. Conversion assumed from standard-form; calculation lives on the multiply-divide and add-subtract siblings. Both tiers. (N1, N9)

• Fluency — direct questions on ordering numbers in standard form, 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).