Home > Genomics > Lesson 3: Size Matters Lesson 3: Size Matters April 9, 2025 Prepare for lesson: Review Life Size activity guide Print Life Size labels (3 sets per page) Supplies for each small group: 1 set of the print out Scissors A large table or floor space to work During the lesson: Ask class about the metric system. What is the usefulness of the metric system when we talk about DNA? Can they put the metric scale in order? Meter Decimeter Centimeter Millimeter Micrometer Nanometer How many meters is each? Or vice versa? In small groups, youth cut out the labels. Have the groups guess the relative size of each label, ordering them from smallest to largest, either, working on a large table or on the floor. Select a few groups to share out. Did everyone have the same order? Give space for the class to think through the order, sharing their reasonings, till everyone is on the same page. Display the right order for them. Did they get it right? Ask them to space items relative to their size. Do they have enough space? Ask: what tools would be required to do work like this? Skills? Previous: Lesson 2: Viral Packaging Next: Lesson 4: Contamination Detectives