Lesson investigates electronic communication from the Morse Code system to text messaging. To learn about this, young scholars construct simple circuits, send messages to each other, and explore the history and impact of communication.

Based off of the hit television show NUMB3RS, this lesson is best used to serve as a preliminary introduction to coding and encryption. Messages are ciphered by single-letter substitution, and the lesson guides students into deciphering...

Based off of the hit television show NUMB3RS, this lesson introduced students to simple coding techniques (namely, the shift cipher). Students learn to translate codes from nonsense to English by quantifying each letter, and then...

Based off of the hit television show NUMB3RS, this lesson introduced students to simple methods of cryptography, most notably the Caesar cipher. By sliding the alphabet a certain number of spaces, students code and decode messages, and...

In this video, Harley moves in with Harry and makes Harry's life miserable. Harley spies on Harry writing in his diary. When Harley "borrows" the diary, he finds it is written in a code using numbers. Harley figures out a pattern with...

This site, which is provided for by the Library of Congress, gives information on the first telegraph invented and the first message ever transmitted.

The discovery that mRNA is not an exact copy of the DNA is the topic of this section from the DNA Learning Center. This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are...

This is an excellent resource for anyone intersted in the Zimmermann Telegram: click to see the original coded message, the decoded message, and read about the implications of the telegram. This National Archives and Records...

At the end of this tutorial, the learner will understand that a range of internal and external filters may alter or obscure a given coded message. It is 2 of 3 in the series titled "Internal and External Filters."

Code-switching is the action of changing your language, behavior, or appearance based on who you're with or where you are. In this lesson, students will apply the idea of code-switching to how they use phones and other devices in and...

This is a simple activity to visualize a communication system. In order to do this the students encode, decode, transmit, receive, and store messages. They will use a code sheet and flashlight for this process. They will also maintain a...

Part of a video series, this clip profiles Marconi who made possible the first wireless message transmitted from England to Cabot Tower, Newfoundland. Learn more about this innovative man and his even more amazing achievement. Links to...

Based off of the hit television show NUMB3RS, this lesson is an introduction to a "different" type of coding, called steganography. In Steganography, images (or text) are split into layers, and then distorted in such a way so as to...

Crack the secret code in five messages to try to find the villainous Ratty.

Based off of the hit television show NUMB3RS, this lesson introduces students to a ciphering technique called the Straddling Checkerboard. In such an encryption scheme, all messages are turned into a series of numbers for transmission....

Create your own affine cipher for encoding and decoding messages. Input your own constant and multiplier, then input a message to encode.

Learners will learn about modular arithmetic in order to decipher encrypted messages.

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...

Instructions for how to build a telegraph device for sending a message in Morse code.

At the end of this tutorial, the learner will understand that telling stories can be a very effective means of communicating complex messages. It is 2 of 3 in the series titled "Stories and Communication."

Julius Caesar encrypted messages two thousand years ago. By knowing the techniques of deciphering a code--frequency analysis, known text, and brute force--one can begin to understand the three key aspects of data encryption, decryption,...

At the end of this tutorial, the learner will understand the general process underlying communication. It is 3 of 4 in the series titled "The Communication Process 101."