Palomar Community College District
Palomar College: Class
In the animal kingdom, there are seven living classes in the phylum Vertebrata. The Palomar College shares detailed information on each of these classes. Includes examples and photos as well as a follow-up quiz.
University of Michigan
University of Michigan Critter Catalog: Amphibians
This site provides a general description of amphibians and then describes in detail the characteristics of local animals in southern Michigan. Pictures, classification information, and sound clips of some amphibians are provided.
Sam Houston State University
Sam Houston State: Class Amphibia
Page presents and discusses the "double life" of amphibians, prior to and following metamorphosis. Good site, using primarily text-based methods.
McGraw Hill
Glencoe Biology: Amphibians: Self Check Quiz
Try these five multiple-choice questions about amphibians. After submitting answers, students can review the material.
PBS
Nh Pbs: Nature Works: Marbled Salamander
The marbled salamander lives in forests and woodlands in the eastern part of the United States, where it is an endangered species in certain states. Students and teachers will find the content to include a look at the species' life...
PBS
Nh Pbs: Nature Works: Western Red Backed Salamander
Learn more about the Western Red-Backed Salamander through the exploration of this resource. This site features information ranging from characteristics and range to life cycle and diet.
California Academy of Sciences
California Academy of Sciences: Echinoderm Webpage
Resource provides a brief overview of echinoderms. Includes pictures and links for more information.
Encyclopedia of Life
Encyclopedia of Life: Amphibians
The Encyclopedia of Life presents this in-depth overview of Amphibians (Amphibia), including their habitats, size, conservation status, and much more. Images of this class and maps of its global distribution can also be found here.