ClassFlow
Class Flow: Road to Freedom
[Free Registration/Login Required] This flipchart takes students on a virtual trip on the Underground Railroad and introduces them to some important people who acted as conductors. It discusses how quilts were created with secret codes...
BBC
Bbc: History: Elizabethan Spying Game
An interactive game in which students try to crack the secret code that incriminated Mary Queen of Scots. Archived.
Khan Academy
Khan Academy: Xor Bitwise Operation
If you've seen the lesson on the one-time pad, you know that it is the ultimate shift cipher. It involves the application of a random list of shifts equal to the length of the message. It's important to understand exactly how and why the...
Scholastic
Scholastic: Math Facts
This one page website from Scholastic offers two math facts games and a secret code idea all to help you remember your math facts.
Fun Brain
Fun Brain: Number Cracker (Number Series Game)
The Number Cracker needs you to help find a secret code by identifying the missing number in a series.
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