Free Course — No signup required

Learn Blockchain & DApps
in 5 Days

Understand blockchain without the hype. Write a smart contract. Build a DApp that talks to it.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

Web3 Basics in 5 Days

Free 5-day Web3 course. Blockchain fundamentals, smart contracts in Solidity, wallets, DApps, and an honest look at Web3 trade-offs.

  • Understand how blockchain works without the marketing noise
  • Write and deploy a simple smart contract in Solidity
  • Connect a wallet (MetaMask) to a web app
  • Build a basic DApp that reads and writes to the blockchain
  • Understand gas, transactions, and why things cost money on-chain
  • Make an informed decision about where Web3 actually adds value
Ethereum
Solidity
Gas
fees
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
Blockchain Fundamentals
Distributed ledger, consensus, Ethereum vs Bitcoin, real use cases
ledgerconsensusEthereum
→
02
Smart Contracts & Solidity
Solidity basics, ERC-20 tokens, deploying to testnet
SolidityERC-20testnet
→
03
Wallets & Transactions
MetaMask setup, signing transactions, gas explained
MetaMaskgastransactions
→
04
Building a DApp
ethers.js, reading contract state, writing transactions from frontend
ethers.jsDAppfrontend
→
05
Web3 Ethics & Trade-offs
Environmental impact, scams, regulation, honest assessment
trade-offsregulationscams
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

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