Curated OER
Caesar Ciphers: An Introduction to Cryptography
Students brainstorm and discuss the concept of cryptography, the science of secrets in today's world and then focus on a system for sending secret messages used by Julius Caesar. They make a Caesar wheel assessing encrypting and...
Curated OER
The Dot and Dashy Language
Students examine and discuss the Morse Code. In small groups they develop messages using Morse code and take turns decipering the messages.
Curated OER
Signal Corps
Students examine the role of signal corps during the Civil War and explore the technique of 'wigwag.' In this Civil War lesson, students discuss the way they communicate long distance today, they research how a civil war soldier...
Curated OER
Base 3
Learners investigate this problem that aims to give a better idea of our decimal system by looking at a comparable system - the base 3 system. By seeing how base 3 numbers work students should have a better appreciation of base 10...