Enrich · Stage 5 · Introduction to networks (Path)

Enrich Identify the number of faces in a planar graph

Extension and enrichment for students who are ready to go deeper: rich tasks, problem solving and open-ended challenges.

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Enrichment for this dot point

• Interactive toolEnrichmentEnrich
  Mathigon: Map colouring
  Mathigon (Amplify) · Interactive (browser) · Free · Link checked 2026-10-15 · Hands-on, No prep
  Use it for: Enrichment: four-colour theorem and planar graph faces.

More enrichment in Introduction to networks (Path)

Rich tasks tagged to other dot points in this focus area.

• Interactive toolEnrichmentEnrich
  Mathigon: Handshakes and dating
  Mathigon (Amplify) · Interactive (browser) · Free · Link checked 2026-10-15 · Hands-on, No prep
  Use it for: Extension puzzles on counting edges and degree sums.
• Rich taskEnrichmentEarly finishersEnrich
  NRICH: Eulerian
  NRICH (University of Cambridge) · Web page · Free · Link checked 2026-10-15 · Low floor high ceiling, Teacher notes
  Use it for: Low-floor, high-ceiling NRICH task extending this dot point; use for extension or a problem-solving lesson.