What CSS framework does TeamTreeHouse.com use?

That's not an easy question to answer. I would suspect that they use a lot of their own customized style sheets on top of a minified version of Normalize. It looks like they're using some sort of a grid layout, but it's tough to say which based off of the fact that their stylesheets seem to be optimized and minified.

if you find out i would greatly like to know also. its great

You have to use a framework that you feel comfortable with. There is no better.

I guess you might want to give a try at Twitter Boostrap. But many others would do the job. Go on the "Initializr" page. This is a framework that include HTML5 Boilerplate and a responsive grid and/or Twitter bootstrap.

Any framework you choose to work with, the most important thing is to read the documentation carefully in order to see if that framework meets your needs and in order to understand how it works properly.

hope it helps.

Would the "normalize" you are referring to be referring to be at github. How would I find "normalize"? Is there a specific teamtreehouse or specific bootstrap available that would somewhat give me the layout of treehouse/twitter? :) Sorry again I am very new to this

Normalize.css can be found here - http://necolas.github.com/normalize.css/

As for a framework, you can really use any one you want. Bootstrap and Foundation are probably the two more popular ones, but you don't have to use a framework. A lot of people seem to want to rely on them these days, but why not use them as references to create your own? It's better to learn how to do everything from scratch, because that's how you grow your skills.

Whatever you choose to do, good luck!

I do agree a lot with you Michael Guerra.