I noticed a few things that aren't exactly problems but I'd say they are worth changing.
1) The pictures on the homepage when you hover, don't blur them. It's not appealing to look at.
2)Purple and Orange are not two colours that clash together very well. I understand this might be the schools colours but try changing the strength of the colours to make it fit more.
3) On Parents > The School Day the time tables could do with a proper format, I don't like the use of tables but it's not too bad a choice in this case.
Aside for little things like this the basic structure of the website is great.
