# Computer science & AI

Source: https://decka.dev/classroom/computer-science

Five cards with 1, 2, 4, 8 and 16 dots are enough to count from 0 to 31 and to write a word. Students choose which cards to turn face up on their phones, meet the carry from fifteen to sixteen, and decode a message written in the same cards, while the screen counts what the room did.

- [Binary Numbers Game for the Classroom — Five Cards, Live](https://decka.dev/classroom/computer-science/binary-numbers-game.md): A binary numbers game for class: students guess the fifth card's dots, turn five cards to show eleven, then sixteen, and decode a word written in the cards.