Understanding genetic variation is a key part of understanding how natural selection (and evolution) operate. This activity allows students to measure their hand spans and then collect information from the class to see differences and similarities.
If you like this activity, you can follow these links to other lessons and activities in my evolution unit.
Darwin's Theory PowerPoint Presentation
Natural Selection PowerPoint Presentation
Evidence of Evolution PowerPoint Presentation
Evolution of Species PowerPoint Presentation
Nature at Work Lab: Demonstrating Natural Selection
Evolution of Horses Activity
Adaptation Activity: Finding Adaptations in Organisms