McGraw Hill
Arthropods
Are spiders related to crabs? Study the order of arthropods with a reading selection about animal diversity. It provides details about each class within the order, as well as vivid pictures and explanatory charts.
CK-12 Foundation
Ck 12: Life Science: 9.1 Invertebrate Diversity
Understand the biological diversity and classification of invertebrates.
CK-12 Foundation
Ck 12: Flex Book Textbooks: Biology Concepts
[Free Registration/Login may be required to access all resource tools.] A complete, web-based, multi-media textbook which serves as a comprehensive overview of Biology concepts.
CK-12 Foundation
Ck 12: Flex Book Textbooks: Life Science Concepts for Middle School
[Free Registration/Login may be required to access all resource tools.] A complete, web-based, multi-media textbook covering a wide variety of Biological science concepts for middle grades.
CK-12 Foundation
Ck 12: Biology for High School
This digital textbook covers core biology concepts and includes interactive features, real-world examples, videos, and study guides.
CK-12 Foundation
Ck 12: Life Science for Middle School
This digital textbook covers core life science concepts and includes interactive features, real-world examples, and videos.
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