**Welcome to Mathematics and Multimedia Blog Carnival 18!**

Before jumping into the blog posts, here are some Fun Facts about the number 18:

- the only positive number that is double the sum of its digits
- a semiperfect number because 3 of its factors (3, 6, and 9) add up to 18...All multiples of semiperfect numbers are also semiperfect numbers.
- the atomic number of Argon
- the legal age for voting for most countries
- Bobby Labonte's car number in the NASCAR Winston Cup Series when he won the 2000 Championship.
- the number of chapters Ulysses, James Joyce's epic novel, was divided
- 18:00 corresponds with 6:00 pm in military time

**Just for Fun:**

Guillermo Bautista (founder of Mathematics and Multimedia Blog Carnival) recently wrote a fun post titled 25 Signs You are a Future Mathematician. You can check out more of Guillermo's posts at Mathematics and Multimedia.

15 Items or Less, an image posted by Dave Gale, is sure to get a laugh. Dave's blog is Reflective Maths Teacher on Posterous.

Wild About Math sometimes reviews math related books. Review: Magical Mathematics was a recent post featuring the book Magical Mathematics.

**Articles Related to Teaching Mathematics:**

In his post, Calculus and Kobe Bryant, Dave Martin uses a video clip with Kobe Bryant to engage students in problem solving. Dave blog is Real Teaching Means Real Learning.

Back to Back Shape Describing Game, another post from Dave Gale at Reflective Maths Teacher, requires students to know and use math vocabulary in order to draw geometric figures.

Patrick Honner presents A Quadrilateral Challenge at Mr.Honner Math Appreciation. He recently posted a creative solution to his original challenge.

What's your problem Part III, is the 3rd in a series of posts by David Coffey. In this series, David explores assessment and evaluation. David's blog is Delta Scape.

In Mixed Up Mixture Problems, David Cox uses Geogebra created graphics to demonstrate how proportional reasoning can be used to solve these traditional algebra problems. You can find more of David's posts at Questions? Trying to Make it Matter.

**Technology Integration:**

Colleen Young shares some of her favorite online resources for teaching mathematics in Top 100 Tools for Learning 2011. You can find more resources from Colleen at Mathematics, Learning and Web 2.0.

Using Popplet in the Math Classroom is one of the most popular posts from this blog.

**For Students:**

Colleen Young recently started the blog, Mathematics/Learning Mathematics - Resources for Students. A Variety of Online Resources is one of her latest posts in which she shares some useful applications for students.

Sanjay Gulati shares many ready to use Geogebra applets at Mathematics Academy. His latest applet demonstrates Adjacent Complementary Angles.

6 Supurb Universities Around the World to Study Math was recently posted on the Tripbaseblog.

Well, that's it for Mathematics and Multimedia Blog Carnival 18. I hope you enjoy these articles as much as I enjoyed putting this Carnival together!