Biology Summary-Taxonomy - http://www.vaughns-1-pagers.com/biology/biology-summary.htm

Biological Diversity: Classification - http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookDivers_class.html

The “Nuts and Bolts” of Taxonomy and Classification - http://jrscience.wcp.muohio.edu/lab/TaxonomyLab.html

Kingdoms & Species Tutorial - http://www.biology4kids.com/files/studies_species.html

Kingdom to Subphylum - http://anthro.palomar.edu/animal/animal_3.htm

Classifying Life: Game from PBS - http://www.pbs.org/wgbh/nova/orchid/classifying.html