This is a virtual game that allows students to practice their knowledge about functions by either finding the input or output of a function. The game also allows students to find the entire function given some information.
Lacoe.Edu

6th grade math knowledge map info
StudyStack

A helpful scientific calculator that runs in your web browser window.
Holt Online Learning

This gives a detailed explanation on what it means for a function to be symmetric about the yaxis, the xaxis, and the origin.
Paul's Online Math Notes

Gives an overview of what functions are by relating them to the real world.
Dr. Math

In this video, Salman Khan of Khan Academy explains functions. Part 4 of 4.
Khan Academy

In this video, Salman Khan of Khan Academy explains functions. Part 3 of 4.
Khan Academy

In this video, Salman Khan of Khan Academy explains functions. Part 1 of 4.
Khan Academy

Gives a detailed description of different types of symmetry of a function using equations and graphs. Shows the student also through another link how to determine if a function is odd or even.
The Math Page
