In this video, Salman Khan of Khan Academy explains completing the square.
Khan Academy

This video includes sample exercises and stepbystep explanations of shifting quadratic graphs and finding xintercepts (roots) for the California Standards Test.
Khan Academy

This video includes sample exercises and stepbystep explanations of solving quadratics and graph shifts for the California Standards Test.
Khan Academy

How to solve quadratic equations using the completing the square method.
SOS Math

Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
Paul's Online Math Notes

Quiz on Quadratic Equations and Applications and Inequalities
SOS Math

Online graphing calculator, useful for drawing out a function to visualize it or find key points.
http://www.coolmath.com

Interactive tutorial and explanation involving qudratic functions (graphing and equations).
Analyze Math

How to solve quadratic equations using the quadratic formula
SOS Math

The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ....
SOS math
