Schools aren't just a source of knowledge--they're a source of germs. In fact, they're a prime breeding ground for the bacteria and viruses that can make us sick. Find out where germs lurk and how they're spread, so you'll know how to stop them.

If the average sponge houses 7 billion bacteria, just imagine how many are in entire classrooms and homes. But you don't have to let germs take over. Fight back against this invisible illness-causing enemy with these kid-friendly cleaning tips.