My labmates Heidi MacLean and Jessica Higgins and I have developed a hands-on activity to teach elementary school students how temperature affects the daily activities and fitness of cold blooded organisms. In this activity, students measure how quickly tobacco hornworm caterpillars eat at cold and warm temperatures. Students also practice making hypotheses and graphing data. If you would like to do the activity in your own classroom, feel free to download the posters and worksheets below. Hornworm caterpillars can be purchased from Carolina Biological Supply. If you’re in North Carolina and you’d like to us to visit your classroom or school group, please email me.