Using Dichotomous Keys

Here's some practice using a dichotomous key.

http://www.biologyjunction.com/dichotomous_keying.htm

http://www.biologycorner.com/worksheets/dichotomous_key_smilies.html

Here's a game you can play to help you practice:

http://webworld.freac.fsu.edu/cameras/keys/sa/tree.html

Here's a video that instructs developing a DK:

Part 1: http://www.youtube.com/watch?v=IFDuz92fzLE

Part 2: http://www.youtube.com/watch?v=QEnTATHJ058