The Art of Experimenting
Like Duolingo, but for The Art of Experimenting. 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.
A short one: 26 levels across 3 sections, about 52 minutes end to end, roughly 10 days at five minutes a day. It moves through Run Your First Test, Think Like a Researcher, and The Science of Discovery. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in The Art of Experimenting
- A testable hypothesis uses an 'if-then' structure
- Predicting results beforehand prevents 'moving the goalposts' after seeing data
- The prediction must be specific enough to be proven wrong
- Falsifiability requires a pre-set standard for what counts as a failure
- Observations are the raw data that spark curiosity
- Predictions connect a specific action to a specific expected outcome
- Distinguishing between observations, vague hunches, and testable predictions
- Changing two variables at once makes it impossible to isolate the cause
- Results are invalid if the 'control' and 'test' groups have different environments
- The amount of starting material must be identical
- The method of measurement or action must be standardized
- The consequence of changing multiple variables simultaneously
- Identifying hidden environmental factors that must be kept constant
- External conditions can act as 'hidden' variables
- Specific physical factors directly influence specific experimental outcomes
- The necessity of predicting results before data collection to prevent bias
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 Art of Experimenting 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.
You're curious about your plants. Which format helps turn that curiosity into a testable hypothesis?
Get it right to open this lesson and 25 more in the app.
Where The Art of Experimenting takes you
Stop guessing and start discovering! Learn how to test your wildest ideas and turn everyday curiosity into real-world breakthroughs.
- 1
Run Your First Test
- Turning a Guess into a Test
- Keeping Things Fair with Controls
- Spotting the Change You Made
- Recording What Actually Happens
- 2
Think Like a Researcher
- Why Failed Tests are Successes
- Finding Patterns in the Mess
- Avoiding the 'I Knew It' Trap
- Sharing Your Findings with Others
- Testing Ideas in Daily Life
- When to Trust a Result
- 3
The Science of Discovery
- How the Scientific Method Evolved
- Famous Accidents That Changed the World
- The Ethics of Experimenting
3 sections · 13 units · 26 levels. Built to play, not to enroll.
You pick the voice
The Art of Experimenting is taught in the The Bestie style: your friend who just gets it. 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 Art of Experimenting today.
Download Tomo, search The Art of Experimenting, and play your first lesson in under a minute.