Use the need for cleanliness during flu season to engage your students.
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Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs?
In this 3-act activity we’ve asked students to consider whether these claims about these two wipes’ efficacy really make a difference. We’ve supplied students with a list of bacteria counts on various surfaces and asked them to calculate how much of a difference these two different percents make in wiping out germs.
This is an excellent opportunity to deal with repeating decimals.
CCSS: 5.NBT.3, 5.NBT.7, 6.NS.3, 7.NS.2.d, 8.NS.1
For members we have an editable Word docx, an Excel sheet with data and calculations, and solutions.
KillingBacteria.docx bacteria-count.xlsx KillingBacteria-solution.pdf
from Yummy Math https://www.yummymath.com/2018/killing-bacteria/
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