Curated resources for teaching blockchain & crypto

Foundation

• Bitcoin whitepaper (original) ↗
• Ethereum docs ↗
• Bitcoin protocol wiki ↗
• Cryptopals crypto challenges ↗

Concept explainers

• SHA-256 overview ↗
• Merkle trees ↗
• Byzantine faults ↗
• Proof-of-Stake ↗

Dev tools

• Remix IDE ↗
• Hardhat ↗
• Blockchain explorers ↗
• Etherscan ↗

Teaching aids

• Hashing Lab — avalanche effect & mini PoW
• Blockchain Demo — blocks & immutability
• Mining Visualizer — leading zeros

Security & audits

• Ethereum smart contract best practices (Consensys) ↗
• OpenZeppelin Contracts docs ↗
• Trail of Bits blog ↗
• Slither static analyzer ↗

Layer 2 & scaling

• Optimism docs ↗
• Arbitrum docs ↗
• Polygon PoS docs ↗
• zkSync Era docs ↗

Standards & specs

• EIP-155 chain ID ↗
• ERC-20 token standard ↗
• ERC-721 NFTs ↗
• BLS signatures (IETF draft) ↗

Data & analytics

• Etherscan (Ethereum explorer) ↗
• Dune dashboards ↗
• Tenderly simulator ↗
• Glassnode on-chain metrics ↗

Useful picks we like

• Hardware wallet we trust ↗
• Beginner-friendly crypto book ↗
• Open security tools roundup ↗
• Crypto UX standards (WalletConnect) ↗

Curated tools and reads we actually use. No affiliate links here.

Crypto news sources

• CoinDesk ↗
• The Block ↗
• The Defiant ↗
• Bankless newsletter ↗

Mainstream industry coverage plus a few opinionated newsletters.