Math and Symbolic Reasoning

Computer Programming in PHP - See how similar PHP code is to an algebra quadratic form equation

Poll Data Margin of Error - Several years of algebra is a  prerequisite to working with the fairly straightforward formula used to establish poll data margins of error.

Standard Deviation Formula - Algebra and calculus are helpful in understanding this formula.

National Security - Knowledge of Abstract Algebra is essential at the National Security Agency

Secret Codes Lesson 1 - A simple code that advances each letter 2 places.

Secret Codes Lesson 2 - The code generator for the 2-letter shift of Lesson 1 and explanations.

Secret Codes Lesson 3 - An improved code that advances each letter 2 places.

Secret Codes Lesson 4 - The code generator for the improved code of Lesson 3 and explanations.

Secret Codes Lesson 5 - An advanced code that transposes letters. This code is difficult to "break".

Secret Codes Lesson 6 - The code generator for the advance code of Lesson 5 and explanations.

Secret Codes Lesson 7 - Instructions on how to create your own unique code.