looks good, The home page looks as though the School Information, Students, parents, headings and pictures ect should be links but they are not, Other than that well done indeed!
Yeah I have one, though it does not pick up underload faults, such as our new PCs are prone to. It will however give you a good idea if there is an obvious fault.
Use Tree Size Pro to find out who are the biggest offenders and squish the image sizes. I also have a digi pics folder that they download all of their images to, this is organised into the years that the images were taken (so they can be archived once out of date).