Students will investigate the tracks and traces left by modern animals and determine what they can learn about an animal from its tracks. Then students will consider what it takes to be a hunter and what kind of evidence can be used to figure out what animal was the first hunter. Discussion questions included.

This brief video lesson discusses the parasitic relationship between jewel wasps and cockroaches. Discussion/assessment questions and suggested supplemental resources are also included.

This quiz allows students to check their understanding of passive transport and facilitated diffusion.

In this lesson, students use a mnemonic device for remembering the phases of mitosis.

In this activity, students work with 3% hydrogen peroxide and several different fruits and vegetables to determine which ones have the catalase enzyme.

In this activity, students will compare immigration statistics with the arrival of invasive species to understand how and why invasive plants came to America.

In this activity, students will map the invasive species present in an area on their school grounds, school forest, or nearby natural area. Older students may standardize and digitize the information for inclusion in a long-term monitoring database.

This video discusses how plastic debris is impacting our oceans. A set of discussion questions and post-viewing activities are provided.

This brief video lesson discusses the evolutionary reasons for pruney fingeres. Discussion/assessment questions and suggested supplemental resources are also included.

This activity encourages students to explore various aspects of complex issues. It encourages students to consider the interaction of science and diverse community views.

In this lesson, students read an article that discusses the physical states of rivers around the globe and work that is ongoing to protect the rivers. Students will research one of the rivers discussed in the article and then participate in a class discussion. Then, they will write a response to demonstrate their understanding of the topic.

In this video, scientists and resource managers speak about balancing the need to manage the Mississippi River Delta for flood control and navigation with the need to maintain a healthy delta ecosystem.

In this lesson, students examine how forensic testing, including DNA fingerprinting, was used to identify bodies found buried in a Russian forest as members of the Romanov family. A set of discussion questions is provided. In an associated activity, students will research how DNA testing and other modern forensic techniques have been used in investigations of other historical mysteries.

In this lesson, students will research one aspect of either hantavirus pulmonary syndrome (HPS) or lymphocytic choriomeningitis (LCMV). Students will use what they learn during their research to produce a public service announcement in the form of a brochure, poster, radio announcement or television commercial. This lesson is for use after students have covered the basics of viruses, viral infection, and immunology. Students should know what a virus is, the basic methods of transmission, and how the human immune system reacts to infection by a virus.

Students use role playing to explore different stakeholders' perspectives on the issue of using transgenic cows to make medicines to treat human diseases.

Students will work in groups (2-4 students per group) to translate the genetic code they receive in the form of a color coded message through various formats ending in their group finding the correct “puzzle piece.” If each group chooses the correct piece when they add together their pieces it will create the protein, Insulin.

Students investigate the action of salivary amylase on starch present in cooked rice. Simple tests for starch and its digestion product, maltose, are applied.

In this lesson, students will develop a deeper understanding of chemical and physical changes as they participate in an activity to see the effect salt has on the body, participate in discussions about making healthy choices about salt and then research/share findings about reasons (pro and con) for reducing salt intake. Extension activities included.

In this video, students learn how the Tijuana estuary stands as the last barrier between the Pacific Ocean and pollution. Its mix of plants and silt acts as a filter that purifies inland rain and floodwaters before they reach the ocean.

In this activity, students review a study in which a team of scientists studied the schooling behavior of stickleback fish by experimentally testing how individual fish responded to an artificial fish school model. Discussion questions are provided.