Rudimentary header styling.
Added widths to header elements.
Added header heights.
Indented header H1.
Changed general font colour to differentiate from header.
Changed header 'div' to 'nav' - woo, HTML5
Nav link styling.
Fixed nav links.
Loaded dissapearing header code from a JSFiddle.
Changed programming description in education.
Bigger margins.
Split text into paragraphs.