You'd be amazed where germs can get when you don't wash your hands well.
Students will recognize that germs are present everywhere, especially on surfaces that are not sterilized. Germs are very small; consequently, people cannot see them without the aid of a microscope. Also, be aware that many germs are good, but some of them can cause health problems.
Make a class graph about keeping clean. Discuss the importance of being honest about your answers for our graph to be accurate. Record the answers and make a graph on the board, which older students may reproduce later. Ask, "How many washed your hands before breakfast, aft...