Modeling Exponential Growth (M&M Activity)

I could present an application problem on the board, have the students plug into their calculator and find the exponential regression equation. However, I think that visualizing the growth is more effective, and allows students to see how fast something like cancer cells can grow. This activity provides a hands on experience with M&Ms while modeling real world concepts.

I found this activity here, but created my own (slightly different) version. I only had enough time for exponential growth, so I eliminated the decay portion.

I really like how students compare the equation that they found to the calculator's regression model. This activity also causes students to discuss each component of the equation, which I think is very important in AFM. Additionally, this brings up a great discussion regarding cancer cells. Do all cancer cells grow exponentially? If time allows, I like for students to do some research (using their phones) to aid with this conversation.

Once I give some independent practice, I rarely have to assist students. After doing this activity, they basically taught themselves! And a plus, they can eat the M&Ms after they are finished collecting the data. I want to apologize in advance to their 1st and 2nd block teachers!

Here is my version: M&M Exponential Growth Lab

~RJ

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