This lab, presented by the National Nanotechnology Infrastructure Network, uses silver nanoplates as a tool to explore the relationship between shape and optical properties. Students will be able to compare material properties and behaviors at both the nano- and macroscale through the exercise, as well as experience with scale and unit conversion. A 'Teacher's Preparatory Guide' is included, featuring needed materials, detailed procedural instructions, and additional resources. A 'Student Guide' includes detailed, step-by-step instructions, space for recording data, and analysis questions.