In this simulation activity students mimic the processes of meiosis and fertilization to investigate the inheritance of multiple genes and then use their understanding of concepts such as dominant/recessive alleles, incomplete dominance, sex-linked inheritance, and epistasis to interpret the results of the simulation. This activity can be used as a culminating activity after you have introduced classical genetics, and it can serve as formative assessment to identify any areas of confusion that require additional clarification.

This video segment from Kentucky Life explains the differences between dragonflies and damselflies and explores their habitats.

This video segment from NOVA: "The Shape of Things" follows the growth of a duck embryo, from a single fertilized egg cell to a complex, hatching duckling.

In this video profile produced for Teachers' Domain, meet teacher Dustin Madden, an IŰ__ŒóíŠupiaq who hopes to inspire students to take an active role in protecting the natural environment by giving them a foundation in math and science.

This movie provides an 18-minute introduction to how NASA is observing our ever-changing planet. On the The Dynamic Earth DVD Web page you can download the video as an iPod or iPhone version, as well as an AppleTV/Full resolution version, and access a glossary and links to related Web sites.

Biological systems (e.g. cells) can make stochastic transitions between phenotypes (e.g. states of relatively increased or decreased drug resistance). This means that an initially drug-sensitive population can generate relatively drug-resistant subpopulations. This video presents a metronomogram, which is a tool for understanding whether such stochastic transitions can provide an opportunity for therapeutic treatment. Citation: Liao D, Estevez-Salmeron L, and Tlsty TD (2012) "Conceptualizing a tool to optimize therapy based on dynamic heterogeneity," Phys. Biol. 9:065005.

In this media-rich lesson, students learn how global warming is changing the Alaskan environment and examine the consequences of climate change on the region's human and wildlife inhabitants.

In this animation produced by WGBH and Digizyme, Inc., see how molecules of DNA are separated using gel electrophoresis, and how this process enables scientists to compare the molecular variations of two or more DNA samples.

A learning activity for the "All About Earth: Our World on Stage" book in the Elementary GLOBE series. In pairs, students will create experimental conditions in terrariums in order to study what plants need to live. Variables to study include the presence or absence of soil, water, and sunlight. Students will record the growth of radish plants as well as observations of "the water cycle" in their terrariums. At the conclusion of their experiments, students will share their results with the class and discuss how water, Earth materials, and air are all necessary to support living things. The purpose of the activity is to acquaint students with the hydrosphere, geosphere, atmosphere, and biosphere more closely, to have students use microcosms to study natural phenomena, and to introduce students to the concept of a "fair test" in a scientific investigation. After completing this activity, students will know about the importance of the hydrosphere, geosphere, and atmosphere in supporting the biosphere. They will learn how to set up "fair test", record detailed observations, use drawings as scientific records, make sense of experimental results, and share them publicly.

Students will be introduced to different species of macroinvertebrates. They will hypothesize why each insect looks the way it does. Then students will make observations of macroinvertebrates. in an aquarium in their classroom. For an optional extension, teachers can take students to a local stream or pond to conduct field observations. The purpose of this activity is to introduce students to hydrology and the study of macroinvertebrates. and to understand how macroinvertebrates. help scientists understand water quality. After completing this activity, students will have an understanding of what macroinvertebrates. are and why scientists study them.

Scientists discuss whether or not endocrine disrupting chemicals, which may cause birth defects and other health concerns, should be controlled in the absence of conclusive proof, in this video segment adapted from FRONTLINE: Fooling with Nature.

This feature, adapted from Interactive NOVA: "Earth," follows the path of energy as it is transferred via the food chain from one type of organism to another.

This video segment, adapted from NOVA, describes the energy flow in a coral reef, including its food web.

This online directory of professional entomological societies covers the entire country. For each resource, contact information, including a link to its Web site, is provided. The list is divided into the following categories: general resources, national headquarters, Northeast, Mid-Atlantic, Southeast, South, Midwest, and California and Hawaii.

This online reference list provides links to nine local and national environmental organizations that have Web sites rich in valuable biodiversity information. Where possible, it includes the following information for each: details about the organization's mission, knowledge base, and activities; the type of support offered, including educational materials, resource libraries, and classes/workshops; and mailing address and contact information. In addition, links to four Web directories are provided, which in turn have links to dozens of other organizations.

This online article, from the museum's Musings newsletter for educators, provides an introduction to environmental stewardship. It discusses Earth's rarity as a planet that supports life and the mounting evidence that indicates human activity is, indeed, altering global climate.

Students learn about enzyme function, enzyme specificity, and the molecular basis of lactose intolerance through experiments with the enzyme lactase and analysis and discussion questions. Students engage in the scientific practices of designing and carrying out experiments and interpreting data. This activity is aligned with the Next Generation Science Standards.

In this video segment adapted from NOVA scienceNOW, learn how what you eat, drink, or smoke may affect the instructions your epigenomes send to your genes, and as a result, change how your DNA is expressed.

In this media-rich lesson, students explore some of the ethical, legal, and social issues related to personal genetic testing and genome sequencing.

In this video excerpt from NOVA, learn about the advantages, disadvantages, and ethical implications of preimplantation genetic diagnosis, or PGD, a technique used to screen embryos created through in vitro fertilization for diseases.