Colored tiles are used to give a geometric form to sequences of odd and even numbers. Numbers are represented by rectangular arrays of tile to give meaning to the ideas of factors of a number and prime and composite numbers. Just for Fun: Number Chart Primes and Multiples

A linear model is used to illustrate the concepts of greatest common factor and least common multiple and how they are related. Just for Fun: Star Polygons

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073053708/78550/star.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (10.0K)</a>	<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0073053708/78550/starshot.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (10.0K)</a>
Star Polygons are a fun way to connect art and math. Not only do they provide decorative and artistic patterns, but also they illustrate the concepts of factor, multiple, greatest common divisor, and least common multiple.

In This Chapter

Number Theory
	Classroom Readings Interactive Math Applet Models for Even Numbers, Odd Numbers, Factors and Primes Bibliography Models for Greatest Common Factor and Least Common Multiple Bibliography