What is Algebra? Algebra defined from the QuickMath website. Algebra is the branch of elementary mathematics which uses symbols to stand for unknown quantities...
Illuminations - New Visions for School Mathematics Illuminations math site (NCTM) on Marco Polo. They have GREAT interactive math applets that are really well thought out. Be sure to go to I-Math and Interactive Math *lets.
Adding Integers with Algebra Tiles Using Algebra Tiles (they have a set you can download) solve integer problems. These activities and site are from The Math Lab, an interactive math laboratory designed so you can EXPERIENCE math.
Algebra II: Integers and Operations Lessons with that help to accurately complete a variety of simple algebra problems involving negative numbers and multiple mathematical functions.