Math Graphing is a part of a larger compilation of K-8 resources assembled by the Jefferson County Schools of Jefferson County, Tennessee. The Jefferson County Schools have hundreds of links for K-8 math, science, social studies, and language arts. I came across this great resource while looking for an interactive graphing activity. I found the activity I was looking for, but of more value is the Math Graphing collection of links from Jefferson County Schools.
Math Graphing has links to 48 interactive graphing activities appropriate for elementary school and middle school use. If you're looking for other mathematics activities, check out the Jefferson County Schools' general math page. The general math page is divided into fourteen categories including fractions, flashcards, integers, telling time, algebra, and geometry.