I’ve been collecting resources for teaching Binary numbers and number systems lately. Today seemed like a good time to share what I have collected so far. And of course to ask people if they have others they recommend.

MathmaniaCS Lesson Plan

A lesson plan/activity for teaching Binary numbers from the MathamaniaCS web site. Includes a graphic on counting in Binary on ones fingers.

How to Count to 1,023 on Your Fingers

This site talks about base ten, base six, Binary, Binary Coded Decimal and Hexadecimal and includes a cute applet that demonstrates counting in those bases on your fingers. As always beware the Binary value for four.

This cartoon (available as a downloadable PDF file) demonstrates how to count to over a thousand by using binary numbers and your fingers.

The Binary System

A guide to a quite confusing concept by Christine R. Wright with some help from Samuel A. Rebelsky. Written for college students and fairly comprehensive.

This game challenges students to set and reset bits to display a binary representation of specific decimal numbers. It is an interactive way for students to practice what they know about binary numbers.

Exploring Binary blog - http://www.exploringbinary.com/

This blog is completely focused on binary numbering and data representation. It is written by Rick Regan who has a B.S., M.S., and Ph.D. in computer science.
Some outstanding sample posts are: