Classroom for DDM Scratch coding club.

Useful link:
https://www.csfieldguide.org.nz/en/chapters/coding-encryption/the-key-distribution-problem/

Useful link 2:
https://cryptii.com/pipes/caesar-cipher

Cryptography challenge

Teams of two people each. Each member of a team gets a secret message that he/she has to send to their teammate over a shared communication channel.