Knowledge Corpus

Knowledge Playground: Quizzes and Flashcards

Test and reinforce your knowledge with AI-generated quizzes, flashcards, and learning games.

The Knowledge Playground transforms your saved content into interactive learning experiences.

Available Activities

📝 Quizzes

AI-generated multiple-choice questions based on your saved content. Each question references specific items, tests comprehension, and provides explanations.

🎯 Flashcards

Spaced repetition flashcards using the SM-2 algorithm to optimize review timing. Cards are generated from key takeaways, entity definitions, and core concepts.

⚔️ Knowledge Duels

Challenge yourself with head-to-head quiz battles featuring timed questions, knowledge exchange, and leaderboard tracking.

Spaced Repetition

BrainTube uses the SM-2 algorithm (same as Anki):

  • New cards start with short intervals
  • Correctly recalled cards get longer intervals
  • Missed cards are shown more frequently
  • The system tracks your memory strength per item

How to Access

  1. Go to Knowledge Playground
  2. Choose an activity type
  3. Select a topic or brain to quiz from
  4. Start learning!

Tips

  • Regular short sessions (5-10 min) beat occasional long sessions
  • Use the Skill Tree to see which topics need more review
  • Quizzes are generated fresh each time — you won't see repeats
Still need help? Email support.