Curated OER
The Five Classes of Vertebrates
What a terrific lesson! Learners discuss the animal kingdom, and classify them as vertebrates and invertebrates. They also identify them as fish, amphibians, reptiles, birds, and mammals. There is even a taxonomic breakdown of popular...
NOAA
Understanding Food Chains and Food Webs
Jump into an exploration of marine ecosystems with the first lesson in this four-part series. After first learning about crustaceans, mollusks, and other forms of sea life, young marine biologists view a PowerPoint presentation that...