One of my favorite ways to kick off the “Evidence of Evolution” topic is with a hands-on activity that gets students thinking about embryology. This quick and engaging task helps them spot patterns in how different species develop before birth, setting up a great discussion about evolution. Be sure to grab this activity at the bottom of the post!
The Activity: Sorting Embryos
I give my students 18 images showing six different organisms at various stages of embryonic development. Their challenge? Sort the images into three different developmental stages using a template. They only get 7 minutes, so they have to work fast and really pay attention to the details! I always love the conversation that this activity fosters amongst the students.
Class Discussion Time
After they’ve sorted the embryos, we dive into a class discussion. I give them some talking points and ask questions like:
- What did you notice about the embryos in the early stages?
- Were some organisms harder to tell apart? Why?
- How did the similarities change as development progressed?
- What do these patterns suggest about evolution and common ancestors?
This activity leads perfectly into our lesson on evidence of evolution, where we talk about how embryology supports the idea that species share a common history.
Want to Try It? Grab the Free Activity!
If you’d like to use this activity in your classroom, I’ve got you covered! Click below to download everything you need, including the embryo images, sorting template, and discussion questions.
➡️ Download the Embryology Activity
Looking for a complete evolution unit? Check out my Evolution Unit Bundle, packed with activities, labs, assessments, and discussion starters to make teaching evolution easy and fun!
➡️ Check Out the Full Evolution Unit Bundle
Give it a try, and let me know how it goes with your students!
Until next time, happy teaching!