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High School Social Studies
Explorer (Ages 8-12)
World History — 20th Century Conflicts
The 20th century was the bloodiest in human history — two world wars, the Cold War, decolonization, Holocaust. Master the key conflicts that shaped today's world.
15 min
+15 XP
Constitutional Amendments and Civil Liberties
The 27 changes to the US Constitution, what civil liberties mean in practice, and how courts have fought over their meaning.
15 min
+15 XP