Author note — to cover

Enlarge from a given centre by positive whole-number scale factors, rays from the centre fixing image vertices, on and off coordinate axes; the image is similar, not congruent. Fractional factors are the both-tier sibling and negative factors the Higher sibling, so keep factors like 2 and 3 here. Both tiers. (G7)

• Fluency — direct questions on enlargement from a centre, 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).