**Title:** Caesar Cipher

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students investigate the Caesar substitution cipher. Text is encoded and decoded using inverse operations.

**Standard(s): **

[MA2013] MI1 (9-12) 4: Explain the development and uses of sets of numbers, including complex, real, rational, irrational, integer, whole, and natural numbers. (Alabama)

[MA2013] MI1 (9-12) 8: Solve problems from non-Euclidean geometry, including graph theory, networks, topology, and fractals. (Alabama)

[MA2013] MI1 (9-12) 10: Determine the mathematical impact of the ancient Greeks, including Archimedes, Eratosthenes, Euclid, Hypatia, Pythagoras, and the Pythagorean Society. (Alabama)