Looks good, but...
1.
I would consider reordering the main menu links. Also putting prospectus (and possibly vacancies) under school information but this might resize your menu and not let it take up the space it has.
Although website pyschology says a user will read your site from top left to bottom right, they read menus from the nearest corner. So your menu would be... home, email, vacancies, departments, school information, prospectus
Which to me feels odd.
2.
There appears to be text under this picture in IE7 (would screenshot but on Girlfriends pc)
School Standards, if its happening to one chances are its happening elsewhere too!
3.
*VERY IMPORTANT* you haven't changed the meta data in your sites back end (found under global configuration), Also consider turning on SEO or using a SEO extention
Sorry if this seems like a bashing but its what I see, and the feel of the site once you've made the changes will be fantastic!
P.S I would just keep home where it is and switch the others around i.e (left-right) email,vacancies,departments,school information,prospectus,home