In this deciphering a message worksheet, students decipher 23 names of famous people given a phone number.  Students use the numbers and letters on a telephone key pad to decipher phone numbers into names.

Students complete a number and letter recognition activity by creating phone numbers for businesses. In this telephone number lesson plan, students brainstorm telephone numbers that include words. Students translate numbers to their...

Young scholars solve addition and subtraction problems and decipher and write messages using a code. They read and discuss an informational fact sheet about the Navajo code talkers from World War II, and decode and re-code messages...

Students examine and discuss the Morse Code. In small groups they develop messages using Morse code and take turns decipering the messages.

How do we determine how much information to include and what can be left out? By playing a game of 20 questions, the class generates the best strategies for finding a number. They then move on to guessing the next letter in a short...

A good review instructional activity on simplifying rational expressions, solving equations with factorials, solving problems on permutations and combinations, and using the Binomial Theorem.  

Students explore the concept of code theory. In this code theory lesson plan, students discuss noise, error correction, Hamming distance, parity check matrices, and cyclic codes. Students develop these concepts through practice and...

In this puzzle worksheet, students solve a set of 9 puzzles about Christmas. Page includes links to answers and additional resources.