Yale University
Yale New Haven Teachers Institute: Animal Kingdom
Background information about all of the classes of the animal kingdom, followed by four short lesson plan outlines.
Curated OER
The Virtual Fossil Museum: Fossils Across Geological Time and Evolution
Picture of the fossil Leanchoilia superlata from the Phylum Arthropoda recovered from Burgess Shale.
Regents of the University of Michigan
Animal Diversity Web: Class Merostomata (Horseshoe Crab)
Find general information about the Merostomata class, which includes horseshoe crabs and the extinct eurypterids. Topics include diet, body charactersitics, and respiratory system.