What's the biggest risk to your IT system security? Probably your users! For all of the efforts that you make, it only takes one user to do something really dumb inappropriate, and suddenly you're back to firefighting.
And how many times have you had to remind your users about some of the things in this list?
At the start of the new term, you might want to remind all of your users about these rules again. We recently covered this list, with further advice and actions, in our At Work newsletter, so if it adds power to your message, then send them this link, or find another way to put the page in front of them (how about redirecting their home page for a week until they get the message!). And this list is also (mostly) applicable for home users too, and with increased connectivity between home and school, the more you can encourage good practice on any computer, the better protected you are.