How sensitive is our skin to touch? Are all parts of our skin equally sensitive? The sensitivity can be easily measured using Von Frey Hairs. Once assembled (directions included) they can be reused for years. 
 
Questions Answered:
How can skin's sensitivity be measured? 
What parts of the skin are most sensitive? 
What kind of information can you get from your sense of touch?
 
Topics Addressed:
Skins' sensitivity can be assessed using Von Frey hairs 
Different parts of our skin have different sensitivity 
Humans gain a great deal of information from touching things
 
Materials Needed
Assorted thicknesses of fishing line; craft sticks or index cards; tape
 
Teaching Time 
About 20–30 minutes, longer with included writing assignment
 
Preparation Time
Assemble the Von Frey hairs (kids can do this)
 
Answer Key
Yes! Plus extensive teacher notes address the many questions that come up. You shouldn’t have to do outside research on this topic unless you want to. Specific charts and graphic organizers have keys. 
 
Target Audience
Middle School Students, Ages 11-14
 
Student Sheets
Scaffolded writing prompts & lab reporting 
Diagrams for labeling