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Teacher’s Mouldy Bread Experiment Perfectly Shows the Importance of Handwashing

mouldy bread experiment

In the state of our world today, the importance of handwashing has become abundantly clear. But if you’re one of those people who still don’t understand why washing your hands is imperative, then this school experiment will show you why!

In 2019, teachers Jaralee Metcalf and Dayna Robertson wanted their pupils to learn why they were constantly told to wash their hands. After finding an experiment related to handwashing on the C.S. Mott Children’s Hospital website, they decided to test it out with their students. And by the looks of it, the experiment well! Metcalf and Robertson both expressed the success of the Moldy Bread Experiment saying it was a doozy and that they’ve noticed longer lines in the bathroom for handwashing.

Now, we bet you’re wondering how they conducted the experiment, right? Read on to find out!

How did the experiment go?

Metcalf and Robertson began their experiment around mid-November last year with the participation of their 17 students and it all began with 5 slices of bread.

The first slice, the control slice, was left untouched and was transferred directly to a Ziploc bag. The second slice was passed around after everybody had just come in after eating lunch. Then, the class washed their hands with soap and water and proceeded to pass around the third slice of bread. After a few hours, the class sanitized their hands with hand sanitizer before passing around the fourth slice. Finally, the fifth slice of bread was wiped across the keyboards of the classroom’s Chromebooks. (P.S. they’re usually cleaned but were left unsanitized for the purpose of this experiment)

After everyone handled the bread slices, they were put in Ziploc bags. Then, hung on the wall so that all the students could monitor the mould growth on each slice. After two weeks, mould started to show and the end result of the experiment was astounding…..

What were the results of the Mouldy Bread Experiment?

The results of the experiment were amazing! First off, the class expected that the bread slice touched with unwashed hands would gather the most mould. But as it turns out, the slice swiped on the class’ Chromebooks were the ickiest and mouldiest of them all! Look at how black that is compared to the slice handled with unwashed hands!

Second, the class didn’t think that hand washing would be the most effective means when it comes to battling bacterial growth but lo and behold! The bread slice touched by the class after handwashing hand had very minimal mould on it!

Finally, the class was surprised to learn that bread handled post-hand-sanitizing gel was not as un-mouldy as they expected it to be! After two weeks, it had yellow and black mould growing on it already! Metcalf says that while sanitizer gels claim to be 99.9% effective in eliminating bacteria, the problem is that kids are not using it the way they ought to since you’re supposed to rub it on your hands for a full 20 seconds.

If there’s anything we can learn from the mouldy bread experiment, it’s that handwashing and keeping yourself clean can go a long way. Imagine touching your face or holding your loved one’s hand and transferring all that bacteria. Not fun. Not not only do you protect yourself from unwanted sickness, but you’re also preventing the spread of viruses to other people around you! So, stay hygienic and wash those hands, folks!

We want to know how you teach your kids that they need to keep clean and wash their hands properly? We’d be happy to hear from you in the comment section below!

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