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FREE COURSE · 60 LESSONS · 3 LEVELS

Learn crypto one block at a time.

A free, structured course in Bitcoin, Ethereum, keeping your own keys and using crypto with care. Each lesson ends with a short quiz. Pass it and the lesson becomes a confirmed block on your chain.

Start with block 01 See the curriculum

Free to use. No card and no wallet needed. An account is optional.

LEVEL 1 · FOUNDATIONS
BLOCK 03 · QUESTION 1 OF 5

What links each block to the one before it?

AThe hash of the previous block
BThe name of the miner
Pass the quiz and the block is yours+100 XP

How it works

01

Read a short lesson

Plain language, one idea at a time, with a checkpoint question to keep you honest.

02

Pass the quiz

Five questions. Get four right to pass. Retries are free and every answer is explained.

03

Confirm the block

You earn XP, extend your streak and move one block closer to your certificate.

The curriculum

3 levels, 12 modules, 60 blocks. See every lesson
LEVEL 1 · BLOCKS 01 TO 20

Foundations

01–05Bitcoin basics5 lessons
  1. 01What is cryptocurrency?
  2. 02Why Bitcoin was created
  3. 03How a blockchain works
  4. 04Mining and proof of work
  5. 05Bitcoin's supply: halvings and the 21 million cap
06–11Ethereum and other assets6 lessons
  1. 06What is Ethereum?
  2. 07Smart contracts explained
  3. 08Proof of stake and staking basics
  4. 09Coins vs. tokens
  5. 10Stablecoins explained
  6. 11Altcoins and memecoins: what you're really buying
12–17Buying your first crypto6 lessons
  1. 12How crypto exchanges work
  2. 13How to choose an exchange
  3. 14Buying your first Bitcoin, step by step
  4. 15Order types and trading fees
  5. 16Dollar-cost averaging
  6. 17Market cap, volume, and volatility
18–20Staying safe3 lessons
  1. 18The most common crypto scams
  2. 19How to research a project
  3. 20How much to invest: risk and position sizing

Ends with the Foundations certificate.

LEVEL 2 · BLOCKS 21 TO 40

Custody

21–25Wallet fundamentals5 lessons
  1. 21What a wallet really is: keys, not coins
  2. 22Public keys, private keys, and addresses
  3. 23Seed phrases explained
  4. 24Custodial vs. self-custody
  5. 25Hot vs. cold wallets
26–30Setting up5 lessons
  1. 26How to choose a software wallet
  2. 27Setting up a mobile wallet, step by step
  3. 28How to choose a hardware wallet
  4. 29Setting up a hardware wallet, step by step
  5. 30Backing up your seed phrase
31–35Moving crypto5 lessons
  1. 31Sending and receiving crypto
  2. 32Network fees and gas
  3. 33Networks and bridges: avoiding wrong-chain mistakes
  4. 34Reading a block explorer
  5. 35Moving coins off an exchange
36–40Advanced security5 lessons
  1. 36Securing your accounts: passwords, 2FA, and SIM swaps
  2. 37Phishing, fake apps, and malicious approvals
  3. 38Passphrases and multisig
  4. 39Inheritance planning for crypto
  5. 40Security checklist and what to do if something goes wrong

Ends with the Custody certificate.

LEVEL 3 · BLOCKS 41 TO 60

Using crypto

41–45DeFi basics5 lessons
  1. 41What is DeFi?
  2. 42DEXs and liquidity pools: how swapping works
  3. 43Lending and borrowing in DeFi
  4. 44Where DeFi yield comes from
  5. 45The risks of DeFi
46–50Staking in depth5 lessons
  1. 46Inside Ethereum staking: validators, rewards and exits
  2. 47Four ways to stake ETH compared
  3. 48Liquid staking tokens explained
  4. 49Restaking explained
  5. 50How to judge a staking offer
51–55NFTs5 lessons
  1. 51What an NFT really is
  2. 52Where an NFT's data lives
  3. 53Buying and selling NFTs: fees, royalties and fake volume
  4. 54NFT scams and how to avoid them
  5. 55Beyond art: names, tickets and tokenised assets
56–60Taxes and records5 lessons
  1. 56How crypto is taxed: the basics
  2. 57Capital gains and cost basis
  3. 58When crypto counts as income
  4. 59Records, forms and tax software
  5. 60Hard cases and common tax mistakes

Ends with the Using crypto certificate.

Built so you finish

Streaks that forgive

Learn daily to grow your chain. Streak freezes cover the days life gets in the way.

Two-minute reviews

Questions you missed come back a couple of days later, before you forget them.

Badges and ranks

Twelve skill badges, five habit badges and seven ranks, from Newcomer to Veteran.

Free account, when you want it

Start without signing up. Create a free account to keep your chain on every device.

Our promise

Education, not advice

We teach how crypto works and how to stay safe. We do not tell you what to buy or when.

Partners are labeled

The course is free. A few lessons carry a partner offer. Each one is clearly marked, never changes lesson content or quiz answers, and earns you no XP. How we make money

Your keys stay yours

We will never ask for a private key or a seed phrase. Anyone who does is running a scam.

BY EMAIL

Prefer email? Start there

Five short emails to get you started, each built on one lesson. After that, one short email a month about what is new. No price tips and no hype.

Free. Unsubscribe any time. See our privacy notice.

Block 01 is waiting.

It starts with one question: what is cryptocurrency?

Start free