In playing around with my sidebar organization, I noticed that I had only posted one article under the “Resources” category. Actually, I had forgotten I made that category — but it’s a good idea. There are a ton of great math resources out on the Web, and I’d love to introduce you to some of my favorites.
So I spent the last two days sorting through several folders’ worth of bookmarks to find the best math resource links for my sidebar. (Scroll down to “A+ math resources.”) Most of these are the math websites I find myself turning to again and again for teaching ideas or just for personal pleasure, though a few are ones I haven’t used but that looked very interesting. In the future, perhaps I will take time to write about them individually, but for now, I invite you to click and enjoy.
And please, share your own favorites with me! I’m always eager to learn more about math.
Update
These links were later expanded to become my Free (Mostly) Math Resources page.
Denise Gaskins' Let's Play Math 
Wow – these are great resources! I will surely be back when we start preparing to homeschool our boys!