CK-12 Foundation
Ck 12: Life Science: Amphibians
[Free Registration/Login may be required to access all resource tools.] Amphibians are a group of vertebrates that have adapted to live in both water and on land. Amphibian larvae are born and live in water, and they breathe using gills....
San Diego Zoo Global
San Diego Zoo: Kids: Amphibians
What makes an amphibian? Check out this site for some exciting characteristics.