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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Checking Sources Against Each Other

History · Historical Thinking · meta

Corroborate: check whether multiple sources agree on the same facts — and investigate why they might not

What mastery looks like

  • Wineburg corroboration heuristic
  • Historical Thinking in the Elementary Years (ERIC)

Check your understanding

If Checking Sources Against Each Other was trying to find out what really happened in a historical event, would they know to look at more than one source and compare what they say?