This lesson is part 2 of 4. After learning about the food safety continuum students will learn protocols that assist the farmer/rancher to do their part to ensure a safe and healthy food supply. This lesson covers what farm biosecurity is and the practices that make a farm safe from biological hazards.

When we hear the word radiation, it壽猻 tempting to picture huge explosions and frightening mutations. But that壽猻 not the full story 壽� radiation also applies to rainbows and a doctor examining an X-ray. So what is it, really, and how much should we worry about its effects? Matt Anticole describes the different types of radiation.Lect

What makes a superhero super? By comparing popular culture superheroes with heroic characters in childrenŐs literature, students learn to think critically about character traits, and consider how cultural perspectives influence the kinds of heroes we choose.

The goal of this activity is to understand how techniques of persuasion (including background, supporting evidence, storytelling and the call to action) are used to develop an argument for or against a topic. Students develop an environmental case study for presentation and understand how a case study is used as an analysis tool.

Students will brainstorm ways that they use and waste natural resources. Also, they will respond to some facts about population growth and how people use petroleum. Lastly, students will consider the different ways that engineers interact with and use our natural resources.

In this activity, students survey other people to find out their thoughts about life beyond Earth and compare their ideas with visitors to the Cosmic Questions exhibit. Students can also analyze their survey data to see whether there is any variation or patterns in answers from men and women or people of different ages. To do this, students will need to design their own method for tracking demographic data. This activity is part of the "Cosmic Questions Educator's Guide" that was developed to support the Cosmic Questions exhibit. Activities in the guide can be used in conjunction with or independently of the exhibit.

This activity uses Dr. Drake's framework to have students consider the implications of each term and make their own estimates of life in the Milky Way galaxy.åÊThis activity is part of a guide that was developed in conjunction with the Cosmic Questions exhibit and complements a museum visit. However, the activities can also be used independently. The format is flexible, and educators can pick and choose the materials that are most appropriate for their students.

This art history video discussion looks at the reconstruction of the "Ishtar Gate and Processional Way", Babylon, c. 575 B.C.E., glazed mud brick (Pergamon Museum, Berlin).

In which John Green teaches you the history of Islam, including the revelation of the Qu'ran to Muhammad, the five pillars of Islam, how the Islamic empire got its start, the Rightly Guided Caliphs, and more. Learn about hadiths, Abu Bakr, and whether the Umma has anything to do with Uma Thurman (spoiler alert: it doesn't). Also, learn a little about the split between Sunni and Shia Muslims, and how to tell if this year's Ramadan is going to be difficult for your Muslim friends. Let's try to keep the flame wars out of this reasoned discussion.

In the wake of a hurricane and beset by an economic recession, the University of Texas Medical Branch on Galveston Island rebuilt for future resilience.

Sal checks whether the commutative property applies for matrix multiplication. In other words, he checks whether for any two matrices A and B, A*B=B*A (the answer is NO, by the way). Created by Sal Khan.

This article is about the isoperimetric theorem. It states the theorem, explains its history and uses examples and exercises to demonstrate it. The resource is from PUMAS - Practical Uses of Math and Science - a collection of brief examples created by scientists and engineers showing how math and science topics taught in K-12 classes have real world applications.

An interactive applet and associated web page that demonstrate isosceles triangles (two sides the same length). The applet presents a triangle where the user can drag any vertex. As the vertex is dragged the others move automatically to keep the triangle isosceles. The angles are also updated continuously to show that the base angles are always congruent. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

An interactive applet and associated web page that provide step-by-step animated instructions on how to construct an isosceles triangle with given base and altitude using only a compass and straightedge. The animation can be run either continuously like a video, or single stepped to allow classroom discussion and thought between steps. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

An interactive applet and associated web page that provide step-by-step animated instructions on how to construct an isosceles triangle with given sides using only a compass and straightedge. The animation can be run either continuously like a video, or single stepped to allow classroom discussion and thought between steps. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

In this activity, students will conduct a survey to identify the environmental issues (in their community, their country and the world) for which people are concerned. They will tally and graph the results. Also, students will discuss how surveys are important when engineers make decisions about environmental issues.

In this activity, students will learn to identify different opinions related to an issue as well as the things (information, values and beliefs) that influence those opinions. They will use an opinion spectrum to analyze the range of opinions in their classroom on environmental issues and understand how these spectrums can be valuable to engineering design.

The "Hit and Run" in baseball is a play that coaches will put on to try to steal a single to the right side by exploiting the movement of the infielders when a runner attempts to steal second base. But, is it still important in today's modern game?

In this video-based activity, students learn that sea level is an average measurement of the height of the ocean, and sea level changes with the seasons and over time. El Ni̱o and La Niṉa events are compared, demonstrating that sea height is a function of temperature.Summary background information, data and images supporting the activity are available on the Earth Update data site. To complete the activity, students will need to access the Space Update multimedia collection, which is available for download and purchase for use in the classroom.