This month’s Carnival of Mathematics is an interactive mind map. Click on the image to check it out, and then click on the + signs to expand each topic. Enjoy!
Meanwhile, April is Mathematics Awareness Month, and this year the focus is on sports. The MAM website features articles, activities, and posters for your classroom. In addition, the ever-helpful Sravani has collected an extensive set of links for your browsing pleasure.
Denise Gaskins' Let's Play Math 
We’re participating in Math Awareness Month. This year is a combination of 2 things that I particularly love: Sports and Math! We’ve created a fun calendar for kids to get them excited about math through the math of sports.
Feel free to share it: http://www.dreambox.com/math_awareness_month
You can even grab the PDF and put it on your own site if you’d like. It’s all about spreading the word.