NumberNut
Number Nut: Shapes Make the Numbers
A brief overview of the ten shapes used to represent numbers in the United States and number symbols of different cultures. Learn the symbols used for Chinese numbers when you play Chinese Symbols Memory. Then, test your counting ability...
AAA Math
Aaa Math: Place Value Expanded Form
You'll find an explanation of place value in expanded form in this lesson. There is also an interesting game that helps to show place value.
University of Virginia
University of Virginia: Counting in Babylon
A discussion of the number system used by the ancient Babylonians. Examples are provided for various mathematical operations based on the number 60 (our number system is based on the number ten).
![Top Science: Decimal Bounce [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Top Science: Decimal Bounce [Pdf] Activity")
TOPS Learning Systems
Top Science: Decimal Bounce [Pdf]
An activity where students learn the meanings of metric prefixes, and how to use them with decimal numbers and with different units of measurement.
Alabama Learning Exchange
Alex: Telling Time to the Hour
This lesson helps children make a connection between the digital and analog clock. In general, the number system is based on units of ten which can sometimes make it difficult for children to realize that time is based on cycles of...
Concord Consortium
The Concord Consortium: Molecular Workbench Zoom It
See examples of scales based on a range from ten to the twelfth meters to ten to the negative twelth meters. Examples range from parts of our solar system to the nucleus of an atom.
PBS
Pbs: Place Value: Musical Digits
Learn about place value and the base-10 number system. This video focuses on using what you know about place value to determine what value each of the three digits represents.