a very basic structure would look like this:
<div class="head">
<div class="leftColumn">
<div class="logo">
logo here
</div>
<div class="announcements">
Anouncements
</div>
</div>
<div class="rightColumn"
<div class="nav">
navigation
</div>
<div class="picture">
Picture
</div>
</div>
</div>
use float on the left column and right column classes to put them in place, and add oveflow: hidden to the head class.