In this lesson, student teams will compare a live worm and a model worm, create worm terrariums, and make observations about worms over time.

In this activity, students will create a model that approximates how the lungs, chest, and diaphragm interact during breathing.

In this lesson, students read an essay, "It's All in the Numbers," about the rapid spread of HIV particles in the body, and learn how to calculate exponential growth using pennies to model HIV particles.

In this lesson, students will create scale models of microorganisms and compare the relative sizes of common bacteria, viruses, fungi and protozoa using metric measures. Students will learn that microbes come in many different sizes and shapes, and frequently are measured in micrometers.

In this lesson, students investigate the human immune system and solve a crossword puzzle featuring vocabulary related to the immune system and microbes.

In this lesson, students will estimate risks associated with different events and compare their estimates to the real probabilities.

This video presentation describes local and global environmental problems and how these problems can impact human health.

In this lesson, students learn that bones and muscles must work to maintain or increase strength and endurance. Students will measure the effects of physical stress on the muscles of their hands, collect and record data, and graph results.

In this lesson, students will use statistical tables of HIV/AIDS data to create presentations about occurrences of HIV/AIDS in the United States.

In this lesson, students will measure their heart rates after a variety of physical activities and compare the results with their resting heart rates, and with the heart rates of other students in their groups.

In this activity, students learn how to measure their breathing and pulse rate, and explore the impact of exercise on their measurements.

In this lesson, students will use evidence to determine whether a patient has a cold, flu, or strep infection. In the process, they will also learn about the differences between viral and bacterial infections.

In this lesson, students will observe onion cells and an Elodea leaf. With these examples, students will be able to see basic parts of cells, including the nucleus, cell wall, and chloroplasts.

In this lesson, students read an essay, "The Deadly Cycle," about HIV viral replication, learn the parts of a single HIV particle, and investigate the HIV replication cycle in a host cell.

In this lesson, students will act as epidemiologists by mapping the prevalence of HIV/AIDS worldwide.

In this lesson, students learn about microbes and the diseases associated with them, learn how diseases are transmitted and impact society, and create art projects representing the diseases they have studied. They also learn that many diseases caused by microbes have resulted in serious debilitation and/or loss of human life.

In this lesson, students collect, grow, observe and compare bacteria and/or fungi in petri dishes, learning that microbes are everywhere and can grow rapidly on sources of food and water.

In this lesson, students read about six milestones in the history of microbiology, create a timeline of events, and learn that many scientific advances become possible only after appropriate tools and techniques have been developed.

In this lesson, students read an essay, "Portrait of a Killer," about the emergence of HIV/AIDS, and learn about the basic structure of the virus by making three-dimensional paper models of an HIV particle.

In this lesson, students are introduced to the structure of muscles. Students will compare and contrast a piece of yarn to a cooked piece of meat.

In this lesson, students learn about the nutritional needs of our bones and muscles, and how to make healthy food choices, especially in terms of getting enough calcium.

In this lesson, students investigate the relationship among mass, acceleration and force, as described in Newton's laws of motion. Students will work in collaborative teams to use a wooden car and rubber bands to toss a small mass off the car. The car, resting on rollers, will be propelled in the opposite direction. During a set of experiments, students will vary the mass being tossed from the car and change the number of rubber bands used to toss the mass. Students will measure how far the car rolls in response to the action force generated.

In this lesson, students learn about healthy eating habits to meet special lifestyle needs, such as those of athletes, persons with diabetes and vegetarians.

In this lesson, students use a light microscope to examine three different microbes: bacteria in yogurt, Baker's yeast, and paramecia in pond water.

In this lesson, students construct paper rockets and evaluate their rockets' flight. Following the flight of the rockets, students reconsider their rocket designs, make modifications, and fly the modified rockets to determine if the changes affected rocket performance. Students conclude the activity by writing a post-flight mission report.

In this lesson, students learn about animal habitats. Students will play a "Concentration" type card game, matching animals with their "place to be."

In this STEM lesson, students will use the engineering design process to design and construct rocket-powered racing cars with which to investigate Newton's Laws of Motion. Each student will construct his or her own car from food trays, and will use inflated balloons to power the car (thrust). Students conduct three trials and measure the distance traveled by the cars. Between trials, students modify their designs to improve performance and solve any "mechanical" problems that crop up. At the conclusion of the activity, students submit a report on their racer design and how it performed in the trials.

In this activity, students are introduced to the concept of "calorie" and compare the relative amounts of energy in similar-sized portions of a carbohydrate-based food and a food rich in oils.

In this activity, students are introduced to the relationship between food and energy. Students will observe what happens when yeast, a single-celled fungus, is provided with food (table sugar).

In this activity, students document their individual eating habits, examining serving size and calories, and learn whether these dietary patterns meet their nutritional needs.

In this lesson, students learn about the skeletal system by designing and building an exoskeleton or endoskeleton for an animal of their own invention.

In this lesson, students learn about endoskeletons by observing, comparing and contrasting different kinds of chicken bones, and by relating their chicken bon observations to human bones.

In this lesson, students work in teams to simulate the movement of blood through the circulatory system by transferring liquid into - and through - a series of containers.

In this lesson, students use sets of cards to categorize microbes' roles and uses, and learn that some microbes can share characteristics with more than one group.

In this activity, student teams construct and launch water rockets. Students will measure and record the altitudes achieved by the rockets.

In this activity, students estimate the mass of microbes in the human body and then begin group concept maps.

In this activity, students measure their own pressure and learn about the health effects of high blood pressure.

In this lesson, students describe the functional differences of X and Y chromosomes and explain the significance of differences in X and Y chromosomes in the human genome.

In this lesson, students estimate average daily baseline energy (Calorie) needs for different levels of activity.

In this lesson, students learn about food selections and compare their own diets to the USDA recommendations for a healthier diet.