What Makes Us Itch? - A Science Lesson

Last weekend we had our first really nice summer-like day of the year. There was lots of sunshine, it was warm, and there was little wind. That little wind is a curse and a blessing in Maine at this time of year. It's nice because it makes for easier bike riding. It's bad because it's easier for the mosquitos and blackflies (gnats) to swarm you. I stopped on my bike to take this picture and got swarmed. And for a few days afterward my arms were covered in itchy bug bites. 

Scratching and trying to resist scratching my bug bites reminded me of the video Why Do We Itch? published a few years ago by Be Smart. What makes us itch? Is there any way to avoid itching? And how can you make those itchy feelings go away? Those questions and more are answered in the video.

Applications for Education
We've all heard of various home remedies for itchy skin and your students probably have too. Before watching this video have students share some of those home remedies. Then have them watch the video and see if the science matches what their home remedies are supposed to do.