Math Is Fun
Math Is Fun: Binary Fingers!
Learn how to count in binary using just your fingers and how this skill can help you in arithmetic. Includes a set of practice questions.
National Council of Teachers of Mathematics
Nctm: Figure This: Bar Codes
An exploration of the binary system using U.S. postal zip codes. Discover what numbers the long and short bars in a zip code represent in this one page activity from the NCTM Math Challenges for Families collection.
Math Is Fun
Math Is Fun: Number Bases
While our number system is based on the number 10, there are many other possible ways to organize a number system, which are explored here.
Math Is Fun
Math Is Fun: Binary Number System
Learn all about the binary number system and how to count in binary. Includes a set of practice questions.
Math Is Fun
Math Is Fun: Hexadecimal Drum Machine
Create rhythms on this 4-instrument hexadecimal drum machine and see what your rhythms look like in the binary, decimal, and hexadecimal number systems.
Instituto Latinoamericano de la Comunicacion Educativa
Red Escolar: Juego Del Salto De La Rana
In Spanish. This site has two educational games with step by step instructions. It also has a biography of different computers pioneers and an explanation of the decimal and binary system.
Math Aids
Math Aids: Number Systems Worksheets
Great resource to practice and strengthen math skills pertaining to number systems. Math worksheets are printable, may be customized, and include answer keys.
Math2
Math2.org: Number Notation
At this website from Math2.org you will find tables with information about number words, meanings, and the symbols used to express them. At the very bottom there is also a Java Base Conversion Calculator.