Live · used in class
Blockchain Simulation Module
Build a chain, tamper with a block, and watch everything after it become invalid. The mechanism is visible rather than described.
Tools
Tools you can run yourself
Interactive teaching tools used in class. Open one, change something, and watch what the mechanism actually does.
Anyone can read what a tool does and what it teaches. Running one needs a free account. Create account
Live · used in class
Public/Private Keys Simulation Module
Sign a message, verify the signature, then change one character and watch verification fail. What a signature actually proves, shown rather than asserted.