Classification is a vital science-process skill for all students to master. Understanding dichotomous keys as a means of classification enables students to better comprehend large amounts of information and understand how to organize, compare and contrast, and analyze that information. To biology students, mastering the dichotomous key provides an avenue through which they can identify any organism they come in contact with. This article discusses how to approach and teach the concepts of classification and identification in science classes. (Contains 5 figures.)