But Fog doesn't require cd's just network boots and can reimage a machine without the need to even go to the classroom
If your increasing your PC count using netbooks and you cannot really expand your network points and switches, have you thought about wireless access points dotted around the school? It's a quick a easy way to get more nodes on the network.
Its just little things - having all machines to network book and with WOL enabled I can - if a teacher tells me its in a continuous boot and needs to be reimaged i can do it without having to leave the room. It will wake the machine up image it - rename - join to domain install all software.
Also things like if you have software that isn't easy to deploy through scripts gpo etc you can create an image and schedule the reimage to happen at 9pm and when everybody come in the next morning they would not be able to tell apart from the fact they have the extra software installed.
Also the fog server has lots of extra's such as the ability to map printers rather then gpo/scripts
Being able to rename a pc remotly if it was moved and the name not changed.
Fog service can deploy software .exes
remote shutdown - the fog service installed locally on windows shutdowns the pc's at 4pm if they have not been logged into for 15 mins.
the ability to have an inventory of all pc hardware
Also before we send machines off to recyle fog can boot them - wipe the hard disks shutdown meaning that there is no possiblity for data to be lost.
Reset a windows administrator password
Boot the machine and scan using clamav
boot and run testdisk on hard disk
Boot and run memtest on the ram.
Plus you don't need a window server to install it on and its free