Most people love cookies. But these cookies are the kind that make the internet possible.

P v NP: A Modern Mystery

Can we measure the time and steps required for things to happen?


State is an important concept in computer science as well as our everyday lives.

Garbage Collection

Computers collect garbage the way humans do. Here's how they manage memory space.

What is Design?

Design is about solving problems, from donuts to race cars, how we eat to what to wear in cold weather.

What are Keywords in Programming Languages?

Everyone knows the difference between saying, “Let’s eat, grandma!” and “Let’s eat grandma!” Computers don't.

What is a Network?

Networks are a mostly hidden but critical part of the internet.

Public Key Cryptography

This cryptography method is based on the fact some tasks are relatively easy to do, but extremely difficult to undo.


Another mysterious four-letter acronym that helps secure information online.

How to Pick a Programming Language

When you pick a programming language to learn first, it helps to figure out what software you want to create.


This odd acronym offers security protection beyond your password. Here are a few examples of how 2FA works.

Software Libraries

Programmers use libraries but instead of books they create and share code, often for free, to help solve common problems.

Computational Thinking

The ability to identify patterns, decompose large problems into small parts, develop algorithms to solve problems, and generalize to find solutions.

Fisher-Yates Shuffle

What sounds like a country western dance actually is an efficient way to sort large sets of data randomly.

Graph Theory

The dots and lines used in graph theory can solve interesting and complicated problems.

The Cloud

If clouds are not digital, what is cloud computing?

What is VR? AR?

Virtual and augmented reality replace or add computing to our real world experience.

Discrete Math: Propositional Logic and Logic Circuits

Discrete math is an important computer science skill that introduces you to logic and logic circuits.


Forks are used in software development to describe how projects and software work.

Invention Literacy

A thoughtful essay to inspire the start of a new school year.

The Ant and The Grasshopper

A computational fairytale updated for the computer age, a grasshopper learns algorithms and planning ahead.


REST is a standard way for software applications to work with each other to do things.

What is the Blockchain?

Blockchain software technology works as a distributed ledger to record what was done and when.


ASCII is a set of letters, numbers, and characters computers use to communicate accurately.

Big-O Notation and the Wizards War

If you were a wizard, wouldn't you want to know how to scale your spells for maximum effect?

The Tragedy of the Commons

How we manage limited resources and share costs is an important question far beyond software development.

Loops, a Fairy Tale

This Computational Fairy Tale explains how loops work through the sad tale of Simon, the hapless apprentice to a blacksmith.

What is Artificial Intelligence?

Computers can be programmed to make intelligent decisions. Does that make a computer intelligent?

What is an Operating System?

Operating system software is a key part of all computers. But what are they and how do they work?

What is the Internet of Things?

The Internet of Things (IoT) connects dumb devices like refrigerators to the internet and uses software to connect them to our daily lives.