Crayfish Structures for Sensing
Lesson 8 of 10
Objective: SWBAT observe structures crayfish use to sense their environment.
I started by asking the class to talk about how they sense their environment. What structures do they have? What are their functions?
Then I asked them what structures crayfish have to sense their environment. I had them share their initial understandings with their table, and then let them know they would be investigating those structures today.
I passed out the Crayfish Sensing Investigation Sheet and had them glue them into their science notebooks. I ordered pretty tiny crayfish, so I included a diagram on the sheet as well. I explained that they would be taking a close look at the structures crayfish use to sense their environment, and see if they could figure out what those structures did based on their behavior. I gave each table a small tub with crayfish and a few hand lenses, and had them get started.
I had them clean up a bit early today because I wanted to spend some time developing experimental questions. I called them over to look at our crayfish question sheet, and discussed research questions as compared to experimental questions. Within the video, you'll see me using Teach/Okay, and Class/Yes, two call and response techniques from Whole Brain Teaching.
I told them that their job was to come up with a few ideas for experiments they could do to find out about how crayfish sense their environments. It might involve any sense they wish, but it may not be harmful to the crayfish.
After looking through their experimental questions, I mostly found several varieties of "What kind of food do crayfish like?," so I spent the following day Planning Crayfish Experiments.