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Metcalf posted the results of the experiment onto Facebook, where it was shared 69,000 times. The CDC has estimated at least 9.7 million flu-related illnesses this season.

\"PHOTO:
Jaralee Metcalf
PHOTO: Jaralee Metcalf, a behavior specialist at Discovery Elementary School in Idaho Falls, posted a science project she and special education teacher Dayna Robertson faciliatated to teach kids the importance of cleanliness.
>
\"PHOTO:
Jaralee Metcalf
PHOTO: Jaralee Metcalf, a behavior specialist at Discovery Elementary School in Idaho Falls, posted a science project she and special education teacher Dayna Robertson faciliatated to teach kids the importance of cleanliness.
>

Metcalf said she got the idea from a similar experiment on Mystery Science, an education website.

\"It's important because of all the illnesses that are so easily transmitted,\" Metcalf said of the learning experience. \"It's gross and handwashing can help prevent.\"

\"PHOTO:
Jaralee Metcalf
PHOTO: Jaralee Metcalf, a behavior specialist at Discovery Elementary School in Idaho Falls, posted a science project she and special education teacher Dayna Robertson faciliatated to teach kids the importance of cleanliness. Slices of bread were used.
>

And she's not the only educator to try it out. An elementary school teacher shared the results of her class' bread experiment, which went viral five years ago.

\"It is so cool and a great way to teach the importance of hand washing,\" the teacher wrote in a Facebook post.

According to the CDC's handwashing campaign, there are five steps to washing your hands the right way to prevent the spread of germs.

1. Wet your hands with clean running water, turn off the tap and apply soap.
2. Rub your hands together with the soap. Lather the backs of your hands, between your fingers and under your nails.
3. Scrub your hands for at least 20 seconds. For a timer, the CDC suggests humming the \"Happy Birthday\" song from beginning to end twice.
4. Rinse your hands well under clean, running water.
5. Dry your hands using a clean towel or air dry.

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