Looks good so far Nathan.
When you minimize it, that usually means that a teacher has come along, so the option to detect when it has been minimized at then on restore/maximise it looks blank(just a page with nothing on it, white). Just an idea...
I hope the site is up and running by the end of half term.
I like that idea but a quick click on the side would be much easier and quicker
/ 
doesn't look to bad either 
