Author note — to cover (Higher)

Higher only (braced G25): prove three points collinear by showing two vectors such as AB and AC are scalar multiples, hence parallel, and share the point A — the shared-point statement being a required line of the proof, not decoration. Full multi-step arguments are the capstone sibling page. (G25)

• Fluency — direct questions on collinear points, 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).