BorderlinesBoundary & Sovereignty Explorer
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AP Human Geography · Unit 4 · Political Patterns & Processes

Borderlines

You've joined the Boundary Commission. Open case files from around the world, read the map and the evidence, and rule on who holds power over each place, and why.

Your name

4 chapters · 12 cases · about 25 minutes

1 · Nations & StatesKurds, Korea
2 · Boundary Types49th parallel, Egypt–Sudan, Partition, Berlin
3 · Lines at SeaUNCLOS zones, South China Sea
4 · Forces That Bind & DivideGermany & France, Catalonia, Crimea, EU

How each case works

  1. Look. The map zooms to the place. Read the three clues.
  2. Claim. Classify the place: 2 points if right.
  3. Prove it. Pick the clue that best supports your claim: 1 more point.

Stuck? The Field guide is free any time. A hint costs 1 point. You'll finish with one AP-style written question.

For teachers: design and alignment

Time: about 25 minutes. Four short chapters (12 cases), then one three-part free-response question.

Model: case-based inquiry using Claim–Evidence. Each chapter starts with its key terms. In each case students classify a real place on an ArcGIS Online map, then pick the clue that best proves it. Feedback explains the answer and names a common misconception.

CED alignment: Unit 4 Topics 4.1–4.5 and 4.7–4.10. The final question links boundary types to centrifugal forces and devolution.

Evidence of learning: a field report (PNG or PDF) with scores by chapter, the final written answer and the student's self-score.

App designed by Tom Baker. Basemaps and country boundaries from ArcGIS Online and Living Atlas.