SMALL CHANGES ADD UP - An Intro to Evolution

I use this formative to introduce a concept that Life Science students struggle with. Basically, how can small changes lead to the diversity of life we see through evolution. (I was inspired by the art of Sol Lewitt - Wall Drawing 797. Check it out at

Basically, each student will try to copy the lines, but it is impossible to copy them exactly. After about 10-15 lines for each student, I will show all the students’ work on the screen. Comparing the last lines drawn for each student helps them visualize a number of difficult concepts, including how very different organisms can descend from a common ancestor.

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I love this activity! It’s such a simple way to convey some difficult concepts!