CK-12 Foundation
Ck 12: Food Chains and Food Webs
[Free Registration/Login may be required to access all resource tools.] Videos, texts, activities, and assessments about food chains and food webs in an ecosystem.
Other
Zephyrus: Food Puzzle Chain
Answer these ten interactive questions about ecological feeding relationships by choosing the correct image that completes each food chain.
Khan Academy
Khan Academy: Activities: Biodiversity and Ecosystem Function
An activity for students to document biodiversity and observe ecological interactions in their own backyard.