Learn
See how systems work.
Choose a subject, then open a chapter. Try the visual experiment, follow what changes and continue to the next chapter at your own pace.
Choose a subject
Computer security
Passwords, passkeys and stolen sessions. See what each protection stops and what can still get through.
Start with account security
View chaptersBlockchain
Start with a digital fingerprint. Build a chain, then explore wallets, keys, recovery and shared control.
8 chapters · Start with hashes
View chaptersDeFi
Decentralised finance: pools, lending, staking and vaults. Follow the returns, losses and limits on withdrawals together.
14 chapters · Start with liquidity pools
View chaptersMachine learning
From decision trees to language models. Change examples, watch the results and test your explanation. No coding or prior calculus needed.
52 core sessions + 7 further explorations
View chaptersStart with a question
Choose what you want to understand. These short tours introduce related ideas; they are not a prerequisite sequence for the full course. Follow a tour or open the lesson you need. You can stop after each explanation, or choose a subject for its full chapter list.
What protects my account—and what can still go wrong?
Separate a check at sign-in from access through an already signed-in session.
Before moving on, explain what changed, why it changed and where the example’s limits are.
Why can AI sound confident and still be wrong?
Separate a fluent answer from evidence, and see how rewards can favour the wrong behaviour.
- Check an answer against evidence
- Watch a reward encourage a shortcut
- Keep the fact fixed, change the reward for agreement
Before moving on, explain what changed, why it changed and where the example’s limits are.
How can a machine learn from examples?
Follow an example, reuse a pattern detector, then explore learning from the results of actions.
- Start with examples and predictions
- Find the same pattern in different places
- Explore actions and delayed rewards
Before moving on, explain what changed, why it changed and where the example’s limits are.
Where does DeFi income come from—and how can I lose?
Follow the borrower’s payment, your claim and the cash available to withdraw.
- Follow supplied and borrowed tokens
- Compare interest with losses and withdrawal cash
- Read the receipt a vault gives you
- See where a Morpho vault allocates the assets
Before moving on, explain what changed, why it changed and where the example’s limits are.
What changes when I stake ETH?
Compare rewards and penalties, then distinguish a staking claim from a market sale or withdrawal.
Before moving on, explain what changed, why it changed and where the example’s limits are.
What happens to my money in a pool or prediction market?
Trace what you own, what changes its value, and what has to happen before you can exit.
Before moving on, explain what changed, why it changed and where the example’s limits are.
Looking for a tool?
Create a QR code, check an Ethereum address or explore a system demonstration.