This is an introductory PowerPoint presentation covering what taxonomy is and the purpose of classification. The history of taxonomy is covered and the 8 levels of classification are briefly introduced using graphics from the Holt Life Science textbook.
I have also created a dichotomous key for popular celebrities to help make the information more accessible to middle school students. The students then create a dichotomous key on their own or with a partner about any topic of his/her choice. These keys are shared with others- you can do this in a "museum" fashion, or by swapping papers, or by individual presentations, or by placing the keys under a document camera for the class to see.