CK-12 Foundation
Ck 12: Third Grade Science: Life Sci: Animal Characteristics and Classification
[Free Registration/Login may be required to access all resource tools.] Presents an overview of the major animals groups (mammals, birds, reptiles, amphibians, fish, arthropods, vertebrates, invertebrates, those having live births and...
Scholastic
Scholastic: Science Explorations: Uncover Lizards and Snakes
An exploration of squamates, or scaled reptiles. Take notes about lizards and snakes using the pdf "Squamate Chart" while viewing a slideshow, investigate the squamate anatomy and how squamates differ from other animals, such as insects...