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Flashcards

The flashcards turn a topic into questions you can quiz yourself on until the essentials are second nature: about fifteen cards for every chapter of the topic's book.

What you get

  • Well over a hundred cards on the bigger topics
  • One question and a one or two sentence answer per card
  • A study mode on the site: cards you know come back later and later, cards you miss come back today
  • Study one chapter or the whole topic, on any device

$11.99 each · PDF, yours to keep

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