This video includes sample exercises and stepbystep explanations of conic sections for the California Standards Test.
Khan Academy

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

A tool that lets you interact with the graph of a parabola by changing the directrix and the focus.
math warehouse

A site with step by step tutorials on how to draw and graph a variety of mathematical functions
Analyze Math

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

A tutorial of parabolas,focusing on vertex form and the focus and directrix, including several example problems.
Algebra Lab

Equations and graphs of parabolas.
Mathworld

Standard form of a parabola and vertex equations
Standard form of a parabola
