Curated OER
Fishes
In this fish learning exercise, high schoolers will review the characteristics of fish by comparing the jaws, skeleton, and fertilization of each fish class. Then students will use a phylogenetic tree to compare the groups of fish to...
University of California
Ucmp: Introduction to Chondrichthyes
Good introduction from Berkeley's department of paleontology, gives a brief history and the defining characteristics of the class of Chondrichthyes.
Other
Pelagic Shark Research Foundation: Glossary
A glossary for terms relating specifically to sharks, many of which are relevant to the entire chondrichthyes class.
Other
Starship Millenium Voyage: Sharks
Very good overall sharks page that concludes with two sections that include shark interactions with man and threats by man.
Other
Johns Hopkins: "Predators Promise"
A good article focused on the issue surrounding the possibility that sharks may hold some key to curing cancer.
University of California
Ucmp: Introduction to Chondrostei
Chondrostei is a mostly forgotten group of cartilaginous fish which deserves at least one page, and here it is. Good information on a cartilagnous fish.
Other
Gerontology Research Group: Sharks Do Get Cancer
An article that is interesting given the shark cartilage industry relevant to the controversy about sharks and cancer.