1. See when the quadratic equation has one, two or no real solutions
http://asset.asu.edu/new/mathactive/lessons/5/look.swf
2. Enjoy graphing quadratic equations
http://asset.asu.edu/new/mathactive/lessons/162/look.swf
3. Try these drag and drops for quadratric equations and more algebra topics
http://wps.pearsoned.com.au/gm12/31/8107/2075428.cw/content/index.html#3
4. Basic algebra lessons
http://www.shmoop.com/basic-algebra/solving-one-step-equations.html