Algebra:
Online Self-Paced Pre-Algebra Course.   Enjoy!
The Math Prof is the only free, online, interactive, talking, Algebra tutorial site.  You actually watch him give his lessons online.
Early Algebra.

Algebra Homework Help

Free text book for Algebra, though it does not include practice
problems. ~Nina

This is a good site for distance, rate, and time problems. ~Nina

This is not an Algebra site specifically, but it is a good site with
information about math anxiety. ~Nina
 Printable Linear Algebra Worksheets, which is really a Jr. College Level Algebra courses

And I would be happy to e-mail a copy of my 180-page "Algebra Workbook" file as a "free gift" to anyone who so requests by e-mailing me at the same address: uncledan@homespun4homeschoolers.com  This is from a Homeschool Dad who has taught his 8children and made these videos for sale, but he does offer his book for free.
Drexel is a Library Science College, so this site was put together by librarians.  Everything is covered here.  Get your tea ready.  Math Forum Internet Mathematics Library  Again, hundreds of links to math resources online, organized by topics from very elementary on up....and up.....and up.  ~Amy

You will need flash to see the workings of this site, but it has great information and walks you through algebra.
Algebra Solutions  Algebraic and Geometric Calculations! Plug in the equation and see the solution! Great for checking your child's math! Or for playing around with equations.
"Purplemath's algebra lessons are written with the student in mind. These lessons emphasize the practicalities rather than the technicalities, demonstrating dependable techniques, warning of likely "trick" questions, and pointing out common mistakes. The lessons are cross-referenced to help you find related material." ~from the site
Geometry:
Geometry Online, On these pages you will find activities for middle or high school geometry. Bookmark this page and check back often. I hope to add at least one activity per month.
Ask Eric's Page on Geometry has lesson plans from many teachers.  With cutbacks in goverment funding, I don't know how long this will be up, so download anything you think you might use.
Geometry Learning Units, everything from Amusement Park Geomentry to Origami Geometry.  Lots of lesson plans to download, most in pdf.
PBS has a listing of lessons that include Geometry
High School Geometry Daily  Lessons, everything you need is here.
It's basically geometry that has amazing projects but the whole site is well worth an
hour of your time. This site even has a recipe for TRIBOLITES! Really!
Site from England that has Algebra and above lessons for you.