Posts to a specific page?

Hello there,
I’ve only just started out in using WordPress. I’ve created a nice looking website but am having trouble filling in the content. This is probably a basic question but I would appreciate it if you could answer ASAP.

How do you write a post and ensure that it is located in the ‘Contact us’/ ‘About us’ page? I can only get a post to appear on the first (home) section and not anywhere else on the website.

Any help would be great,

Dan

http://www.teenpolitics.co.uk