This lesson, presented by the National Nanotechnology Infrastructure Network, covers the metric system. Students will explore the use of the metric system in the activities, and also "read the How Stuff Works article –“How Nanotechnology Works” and answer questions about the article. Further connections of size and the nanoscale can be found in the Resources at the end of the unit."  This activity will take two 50 minute classroom sessions. Two Teacher Preparation Guides and Student Guides are included.