Learn
Blockchain lessons, track by track
16 short lessons across 6 tracks, each with a quiz you can check your answers against as you read.
⛓️ Track 1 of 6
Blockchain Fundamentals
What a blockchain is and why it works
🧱 Track 2 of 6
Layer 1, Layer 2 & Rollups
How blockchains scale beyond the base layer
Layer 1: The Base Blockchain
What makes a chain a 'Layer 1', and why everything else settles back to it.
6 min readThe Blockchain Trilemma
Why decentralization, security, and scalability are hard to have all at once.
5 min readWhat Is a Layer 2?
How L2s inherit Layer 1 security while processing transactions elsewhere.
6 min readRollups: Optimistic vs ZK
Two different ways rollups prove their off-chain execution was honest.
8 min readSidechains, Bridges & Other Paths
Alternatives to rollups, and the risks of moving assets between chains.
6 min read
🔑 Track 3 of 6
Wallets & Keys
Custody, keys, and staying in control
💱 Track 4 of 6
DeFi & Tokens
Finance rebuilt from smart contracts
🖼️ Track 5 of 6
NFTs & Ownership
Unique tokens and digital ownership
🛡️ Track 6 of 6
Security & Safety
Avoid the traps that drain wallets
Look up a term
Every lesson links the terms it introduces back to a full definition.