Codes and Ciphers Unit

Grade Four Pull-Out EXCEL Program

Unit Overview

**Objectives overview:**

Each lesson in this unit will teach students a new code or cipher and its history. Students will experiment using the code or cipher by creating their own secret messages in various formats.

Lesson 1: History of Cryptology: Codes and Ciphers

Lesson 2: Transposition Ciphers

(Space Ciphers, Backwards Ciphers, Backwards Space Ciphers)

Lesson 3: Substitution Ciphers (Pigpen Ciphers)

Lesson 4: Diagram Cipher (Tic Tac Toe Cipher)

Lesson 5: Picket Fence Cipher

Lesson 6: Number Ciphers

Lesson 7: Stolen Secret Code

Lesson 8: Caesar’s Code/ Alphabet Shift Cipher

Lesson 9: The Code Wheel/ Cryptograph Wheel/ Cipher Wheel

Lesson 10: Underground Railroad Quilt Code

Lesson 11: Maze Cipher

Lesson 12: Semaphore

Lesson 13: Braille

Lesson 14: Morse Code

Lesson 15: Detective’s Notebook

Lesson 16: Ogham Cipher

Lesson 17: Hieroglyphs

Lesson 18: Grid Number Cipher/Letter Word Cipher (Shopping List)

Lesson 19: Enigma Cipher

Lesson 20: Scytale

Lesson 21: Zip Code Bars

Lesson 22: Rambungi Island Adventure

Culminating Experience:

Students will create a pop-up book, comprised of at least nine codes or ciphers learned throughout the unit. Each page should be dedicated to a specific code or cipher, so that the teacher may individually evaluate each learned concept.