The Seattle-King County Health Department is very proactive and has consistently produced some of the best pandemic flu resources in the nation.
I’ve highlighted a number of their efforts in the past, particularly their pandemic flu comic book and video No Ordinary Flu (see Seattle - King County: No Ordinary Flu).
Today, in a visit to their site, I’ve found a 2 page comic-style guideline for keeping kids home when they are sick. You can download it in PDF format, and print it out.
It would make a good handout for any school.
There are also a number of excellent posters available for DOWNLOAD HERE, and many are available in multiple languages. I’ve reproduced just a couple here, to give you an idea of what is available.