Any website suggestions?

At this point in my life I can only benefit from increasing my skills in math. I feel like I need to start over from the beginning and work my way all the back up.

Google yielded this website:

http://www.eduref.org/Virtual/Lesson...c/ATH0013.html

This is the type of website I am talking about, but i'm not sure where else to go or where to look. I'm primairily looking for somewhere that teaches lots of shortcuts and where you can learn to teach yourself how to do problems in your head.

help?

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