All Courses — Learn Web3 for Free
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Blockchain Basics
How blockchains actually work, from first principles: why they were invented, how blocks link, who runs the network, how consensus works without bosses, to
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Certified Decentralization Analyst
Course Information Course Instructor Author Free FREE Free forever during our beta. Create a free student account, enroll, and earn your certificate. Enroll for Free…
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Crypto Fundamentals from Zero
Course Information Course Instructor w3d_admin Author Free FREE Free forever during our beta. Create a free student account, enroll, and earn your certificate. Enroll for…
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DeFi 101
Understand decentralized finance the safe way: DEX trading, lending, stablecoins, yield, contracts, bridges — with a safety playbook that keeps beginners a
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L2 Developer Path
From L2 fundamentals to shipping on testnets: OP Stack mechanics, bridging, comparing Optimism/Arbitrum/Base, blob space, sequencer risks — then a practica
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Security & Self-Custody Advanced
Think in threat models, not tips: famous hacks dissected, a 15-minute audit checklist, SIM-swap and address-poisoning defense labs, multisig safe setup, an
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Smart Contracts for Beginners
Programs that run themselves: how contracts execute, reading real Solidity, tokens as contracts, DeFi composability, famous hacks as lessons, oracles, and
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Wallets & Security 101
Hold your own keys without becoming your own worst enemy. From your first wallet setup to multisig, scam defense, and inheritance planning — the complete b