As an education major in college, I had a great professor who helped us understand how to teach math.  Since her class, I have always had a bit of rebellion when it came to traditional math as I knew it…just learning formulas without fully understanding the concepts. 

I love the Charlotte Mason methodology and "living books" so here are some of the best living math sources that I've found through the years.

This site has lots of great information for "living math"...it has
articles, lesson plans, links to other good math sites, games to play,
living books on math - some with reviews.
http://www.livingmath.net/

Penny Gardner's page on site...living math books and mathematical
classics
http://www.pennygardner.com/mathclassics.html

Simply Charlotte Mason

Your Business Math Series is a fun and “living math” kit that reinforces math skills for ages 8–12! Your student uses his math knowledge to keep his very own store running and, hopefully, make a profit. But there are also some surprises along the way!

http://simplycharlottemason.com/books/your-business-math/

The Living Mathematics Project...uses computer animation/tech to present
interesting projects
http://sunsite.ubc.ca/LivingMathematics/V001N01/UBCExamples/