Where's your doctype?
You should be using h1 & h2 as apposed to images.
It's better if you use divs/css over tables. You have more control over what you can do and tables should only be used to display tabular data, not layouts. I see it was created in Dreamweaver so I guess it's not your fault.
Is the layout going to remain the same? Because if it is the content area is quite thin. It might be a good idea considering making it taller to fill the whole browser window, there's quite alot of white space at the bottom.
Other than that it's quite nice and I like it. However, the colours are a bit dull. I realise they're the schools colours but maybe pick out the blue from the logo and make the background a pale blue to make it that little more interesting. Just a thought.
Hope that helps.