Examine how organisms interact through a hands-on experience. Learners study population dynamics and distribution during an informative five-lesson unit. The focus is on the ocean environment and the organisms within it.

Celebrate the geography of the Americas and develop map skills through a series of activities focused on the Western Hemisphere. Learners study everything from earthquakes and volcanoes of the Americas and the relationship...

Students investigate the system of classification for living things through the sixteen lessons of this unit. The five kingdoms of monerans, protists, fungi, plants, and animals form the basis of several experiments as the similarities...

At first glance, grassland ecosystems might seem dull and uninteresting, but once you start to explore it's amazing the things you'll find! Through this series of engaging lessons, activities, and experiments, elementary students examine...

Students explore the topics of ocean water salinity, ocean life zones, marine life classification, and ocean food chains. They observe demonstrations, conduct experiments, complete quizzes and handouts, and analyze key vocabulary.

Through an interactive learning module, students investigate the importance of species richness and biological diversity.

Instructional module focusing on the early work of Charles Darwin. Discusses Darwin's key role in supporting and describing the theory of evolution as driven by natural selection. Site also includes an interactive practice quiz and links...

Recombinant DNA technology has made it possible to gain insight into how genes work. This concept is further developed in this article with an animated explanation, art gallery, audio/video interviews, biographies, and an interactive...

Examples of using DNA for forensic purposes is discussed here, as well as uses to unravel historical puzzles, trace the history of a species and answer health problems.

Instructional module focusing on Charles Darwin's explanation of natural selection as the mechanism for evolution. Discusses how this force of natural selection promotes changes in species over time. Site also includes an interactive...

Instructional module focusing on binomial nomenclature. Discussion includes Carolus Linnaeus' taxonomic classification system for naming all species. Site also includes an interactive practice quiz and links relating to the topic.

Instructional module focusing on Charles Darwin's theory of Descent with Modification. Discusses how slight changes from parent to offspring create variation and potentially create new species over time. Site also includes an interactive...

Instructional module focusing on biological classification. Discussion includes Carolus Linnaeus' taxonomic classification system for organizing and classifying living things. Site also includes an interactive practice quiz and links...

Students review the study of living things and make connections back to Earth's systems. This unit focuses on how various species, grouped in populations and communities, work with the nonliving things around them to ensure survival.

This is an extensive learning module on biodiversity and its decline. It looks at ways biodiversity is threatened, the possibility of another mass extinction, the causes and consequences of habitat loss, factors that drive biodiversity...

This is a collection of courses on communities and ecosystems. Some topics explored are productivity, food webs, and ecology. The courses offer video clips, lecture notes, practice problems, and exam questions. Practice problems and exam...

[Free Registration/Login may be required to access all resource tools.] A population is a group of organisms of the same species, all living in the same area and interacting with each other. Since they live together in one area, members...

[Free Registration/Login may be required to access all resource tools.] Predation is another mechanism in which species interact with each other. Predation is when a predator organism feeds on another living organism or organisms, known...

Instructional module focusing on why species change over time through behavioral and physical adaptations. Discusses how environmental mechanisms influence adaptive evolution. Site also includes an interactive practice quiz and links...

Learn all about the study of animals--zoology through this interactive website. You will learn about the processes that make animals alive, what makes them endangered or extinct, and the tree of life.

[Free Registration/Login may be required to access all resource tools.] Introduction to ecosystems and other ecological concepts.

[Free Registration/Login may be required to access all resource tools.] Covers how species interact with each other.

This excellent resource explores all of the biomes found on planet Earth! A side menu indicates the world's biomes and provides details on each. Colorful interactive maps, video clips, lesson plans, species profiles, and so much more...

An online course with interactive activities and learning exercises give students the opportunity to look at the tree of life and to determine how and why scientists believe each domain, species, and everything in between have such...