The Historian's Detective Kit
Like Duolingo, but for The Historian's Detective Kit. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
170 levels across 8 sections, about 340 minutes end to end, roughly 68 days at five minutes a day. It moves through Cracking the Case: Reading Between the Lines, The Ripple Effect: How Small Events Change Everything, Power and People: Who Gets to Write the Story, Money and Maps: The Engines of Empire, Culture Shocks: When Worlds Collide, The Psychology of the Past: Why They Did It, The Science of Discovery: Tools of the Trade, and The Big Picture: Why History Matters Now. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in The Historian's Detective Kit
- Authors write with a specific goal like seeking praise or funding
- Personal involvement makes it hard to separate facts from feelings
- The level of detail changes based on what the reader already knows
- The tone of a document reveals the relationship between author and reader
- Why neutrality is rare in historical documents
- Identifying intended audience through tone and content
- Using loaded words that trigger strong emotions
- A person's job determines what they value most in a situation
- Leaving out facts that make their side look bad
- Social status affects who a person blames for a problem
- Clues that an author is trying to persuade rather than inform
- How social position influences descriptions of conflict
- Different goals cause people to notice and record different details
- Investigating the author's background must happen before reading
- Two 'true' accounts can look different based on what the author emphasizes
- Checking the date and location provides context for the claims
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Historian's Detective Kit the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why might a general's letter written right after a battle be a bit 'salty' rather than a neutral record?
Get it right to open this lesson and 169 more in the app.
Where The Historian's Detective Kit takes you
Move beyond memorizing dates and start uncovering the 'why' behind the past. Learn to spot bias, decode propaganda, and piece together the hidden stories that shaped our modern world.
- 1
Cracking the Case: Reading Between the Lines
- Spotting the Author's Hidden Motive
- The Art of Comparing Conflicting Accounts
- Reading What Isn't There: The Power of Omission
- Identifying Propaganda in Primary Sources
- 2
The Ripple Effect: How Small Events Change Everything
- Tracing the Long-Term Consequences of a Single Choice
- The Domino Effect: When One Revolution Sparks Another
- Accidental History: The Role of Luck and Weather
- How Technology Rewrites the Rules of War
- The Unintended Side Effects of New Laws
- 3
Power and People: Who Gets to Write the Story?
- History from the Bottom Up: The Commoner's Voice
- How Winners Shape the Narrative of the Losers
- The Evolution of Hero Worship and Statues
- 4
Money and Maps: The Engines of Empire
- Follow the Money: How Trade Routes Build Cities
- The High Cost of Maintaining an Empire
- Resource Hunger: Why Nations Fight Over Borders
- The Impact of Currency on Social Stability
- 5
Culture Shocks: When Worlds Collide
- The Exchange of Ideas, Foods, and Diseases
- How Religion Migrates and Transforms
- The Birth of Hybrid Cultures
- Resistance and Adaptation Under Foreign Rule
- The Global Impact of Artistic Movements
- Language as a Tool of Conquest and Survival
- 6
The Psychology of the Past: Why They Did It
- Avoiding the Trap of Modern Thinking
- The Role of Fear and Paranoia in Leadership
- How Social Pressure Drives Mass Movements
- The Influence of Superstition on State Decisions
- 7
The Science of Discovery: Tools of the Trade
- How Carbon Dating Changed Our Timeline
- Using DNA to Trace Ancient Migrations
- Satellite Imagery and Lost Cities
- 8
The Big Picture: Why History Matters Now
- Recognizing Patterns in the Rise and Fall of Nations
- How the Past Dictates Modern Diplomacy
- The Ethics of Returning Stolen Artifacts
- Historical Memory: Why We Forget Certain Eras
- Using the Past to Predict the Future
8 sections · 34 units · 170 levels. Built to play, not to enroll.
You pick the voice
The Historian's Detective Kit is taught in the The Pirate style: arr, learning be an adventure!. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Historian's Detective Kit today.
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