This week I'm sharing a packet of materials on using and making dichotomous keys. You'll find a page of informational text, directions for using a key, directions for making a key, and two different student worksheets. Here's a sneak peak at the contents. Download Dichotomous Keys. I hope you get a chance to use these in your home or classroom. Please let me know if you try these and how you like them! **Updated January 2019. Please note that in the updated version the Blue-footed Booby has been replaced with another animal.