The purpose of this video lesson is to expand the student's knowledge about enzymes by introducing the antioxidant enzymes that are intimately involved in the prevention of cellular damage and eventual slowing of the aging process and prevention of several diseases. Students will learn that natural antioxidant enzymes are manufactured in the body and provide an important defense against free radicals. The topic of free radical action is introduced, covering how they are constantly generated in living cells both by "accidents of chemistry" and also by specific metabolic processes.

There are a number of hands-on and interactive scientific lesson plans, each inviting students to learn what is known about earthquakes, earthquake hazards, and hazards preparedness. Prior to the start of lessons, it is important to assess student's knowledge of earthquakes and hazards. The pre-assessment activity creates a means to do this. Lessons 1-6 target physical processes related to earthquakes. Lessons 7-11 focus on hazards associated with earthquakes and mitigation strategies. Lesson 12 provides a unique means for reinforcing concepts covered during previous lessons.

Students will identify the major evolutionary innovations that separate plant divisions, and classify plants as belonging to one of those divisions based on phenotypic differences in plants. They will also classify plants by their pollen dispersal methods using pollen dispersal mapping, and justify the location of a crime scene using map analysis. Students will also be able to analyze and present their analysis of banding patterns from DNA fingerprinting using plants in a forensic context.

Students will learn how mutations can result in tumor heterogeneity and make tumors more sensitive or resistant to chemotherapy treatment. Students participating should have a basic understanding of cellular division (mitosis) and DNA structure and replication. Using this knowledge, students will run a tumor growth and treatment simulation to model how a tumor's heterogeneous composition can change the efficacy of chemotherapy treatment.

In this lesson students will learn how mutations can result in tumor heterogeneity and make tumors more sensitive or resistant to chemotherapy treatment. Students participating should have a basic understanding of cellular division (mitosis) and DNA structure and replication. Using this knowledge, students will run a tumor growth and treatment simulation to model how a tumor’s heterogeneous composition can change the efficacy of chemotherapy treatment.

In this video module, students learn how scientists use genetic information from dogs to find out which gene (out of all 20,000 dog genes) is associated with any specific trait or disease of interest. This method involves comparing hundreds of dogs with the trait to hundreds of dogs not displaying the trait, and examining which position on the dog DNA is correlated with the trait (i.e. has one DNA sequence in dogs with the trait but another DNA sequence in dogs not displaying the trait). Students will also learn something about the history of dog breeds and how this history helps us find genes.

This lesson is about the flow of energy in ecosystems. The setting is Plimoth Plantation, a living history museum in Plymouth, Massachusetts, USA, where students will learn about the first Thanksgiving meal in America, celebrated in 1621 by early American settlers and Wampanoag Indians. By examining this meal and comparing it to a modern day Thanksgiving celebration, students will be able to explore the way in which food energy moves and is transformed in an ecosystem.

This very interactive video lesson uses the Simple Pendulum experiment to enable students to answer the fundamental question: What is the value of g in my school and in my home? Students will learn to calculate this value by working in groups to make pendulums of different lengths and by learning to count pendulum oscillations.

The goal of this lesson is to assist students to relate the forces acting upon particular objects and the unseen resolution of those forces. The video begins with a story line involving Adam, who helps his father in the garden by disposing of a garbage bag of leaves the very act that involves resolution of forces.

This lesson focuses on how cancer is caused by mutations that accumulate over time in cells' DNA, how the genes mutated in cancer are involved in normal cell growth & division, and how different types of mutations affect the functions of these genes.

Students will learn the genetic mechanisms that cause variation among humans (parents and children, brothers and sisters) and how to calculate the probability that two individuals will have an identical genetic makeup.

The goal of this lesson is for students to understand just how many particles Avogadro's Number truly represents, or, how big is a mole.

The aim of this lesson is to introduce the concepts of heat and temperature, which many students find confusing. Students will be asked to explore and discuss situations where even though the same amount of heat is absorbed by several substances, the increase in temperature of the substances is different. Students will also carry out several experiments to compare and relate the situations where the same amount of heat absorbed by substances will result in different temperatures.

We learn how insects can fly in the rain. The objective is to calculate the impact forces of raindrops on flying mosquitoes. Students will gain experience with using Newton's laws, gathering data from videos and graphs, and most importantly, the utility of making approximations.

This lesson focuses on energy production in the body through the digestion of food. The concepts covered here involve the expenditure of energy from nutrition and cellular respiration, with a particular focus on the strenuous energy demands of marathon running. For the learning activities, students will design their own menu to prepare for the big race, with careful attention to prevent hitting the wall's situation caused by depletion of a glycogen source in the body during extreme activity.

This lesson uses the fundamentals of protein synthesis as a context for investigating the closest living relative to Tyrannosaurus rex and evaluating whether or not paleontologist and dinosaur expert, Jack Horner, will be able to "create" live dinosaurs in the lab. The first objective is for students to be able to access and properly utilize the NIH's protein sequence database to perform a BLAST, using biochemical evidence to determine T rex's closest living relative. The second objective is for students to be able to explain and evaluate Jack Horner's plans for creating live dinosaurs in the lab.

Students will see the different types of evidence scientists use to understand evolutionary relationships among organisms. They will first practice by using shared physical characteristics to predict relationships among members of the cat family and then use this approach to predict primate relationships.

This lesson will explore the connections between magnetism in natural materials and electromagnetism. The ultimate goal will be for students to form an understanding that the source of magnetism in natural materials is moving charges. It is helpful, but not required, for the students to have some work with electricity, and other distance forces (such as gravity or the electric force).

The concept of momentum applied to hard-body collisions is explained using a number of simple demonstrations, all of which can be repeated in the classroom. Understanding Newton's Laws is fundamental to all of physics, and this lesson introduces the vital concepts of momentum and energy, and their conservation.

This lesson focuses on the process of pollination. The learning objectives include learning the anatomy and physiology of flowers, the ecology of pollination, and a focus on plants as essential players in the natural world.