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Plates on the Move
This fun Web article is part of OLogy, where kids can collect virtual trading cards and create projects with them. Here, they learn about the Earth's outer shell and its constant movement. It begins with an overview that explains tectonic plates and the four things (slip, spreading, collision, and subduction) that can happen when the edges of the plates meet.
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Progression of Hurricane Jeanne, 2004 (WMS)
Hurricane Jeanne was the fourth hurricane to hit Florida during the 2004 hurricane season. This set of images shows the progression of the hurricane as it approached Florida from the Atlantic Ocean and the Caribbean Sea. When it hit the Florida coast on September 26, Jeanne was a Category 3 storm with sustained winds near 115 miles per hour.
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Multiple Slit Diffraction Model
The EJS Multiple Slit Diffraction model allows the user to simulate Fraunhofer diffraction through single or multiple slits. The user can modify the number of slits, the slit width, the slit separation and the wavelength of the incident light. The scale of the diffraction pattern can also be changed and a plot of the light intensity can be toggled on and off with a checkbox.
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Contracting and Signaling, Winter 2008
Course prepares you to advise clients or your own organization on the design of contracts and screening policies when one of the parties has an information advantage over the other. For example, students study the design of patent licenses (the licensor knows more about the market), the design of social systems to reduce spam (the spam sender knows more about the content before the recipient decides whether to read), and the design of performance contracts for professional services (e.g., consul
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Decision-Making in the Field: Lawrence Summers
Lawrence Summers on Obama's Leadership During the Financial Crises. March 2011
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Thoughts on Race and Ethnicity Through the Mirror of American Literature
Presented by Professor David Tower. This is the fourth lecture in the 2011 GRCC Race and Ethnicity Conference.
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Pressure + Ink: Introduction to Printmaking
Produced in conjunction with the exhibition German Expressionism: The Graphic Impulse. Find out more at http://moma.org/germanexpressionism Special thanks to Phil Sanders, Director and Master Printer, Robert Blackburn Printmaking Workshop. A program of The Elizabeth Foundation for the Arts. Created by Plowshares Media PlowsharesMedia.com © 2011 The Museum of Modern Art, New York
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Authors@Google: Mark W. Moffett
Mark W. Moffett spoke to Googlers in Mountain View on March 11, 2011 about his book Adventures Among Ants: A Global Safari with a Cast of Trillions. About the book: Intrepid international explorer, biologist, and photographer Mark W. Moffett, "the Indiana Jones of entomology," takes us around the globe on a strange and colorful journey in search of the hidden world of ants. In tales from Nigeria, Indonesia, the Amazon, Australia, California, and elsewhere, Moffett recounts his entomological ex
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The 2 Secrets to Sending People to Mars
Hank revisits his passion for exploring the Red Planet, breaking down the two biggest challenges of sending humans to Mars: radiation and propulsion. He explains the science behind the obstacles future Mars-bound astronauts will face, as well as they technology they'll have to use to surmount them. Onward! (10:02)

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The water cycle: what goes around comes around
The resources here will provide you with content information as well as lessons and activities to guide your students to deeper understandings of the nature of water, the need for and intricacies of its management, and why water management issues can be divisive.
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Chestnut shell
Squirrels use their teeth to bite into and crack open chestnuts and other kinds of nuts. Their teeth leave marks on the nutshell after the squirrel has cracked it open to get the nut that is inside.
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Visual Datasets
The Visual Datasets text module discusses the concept of visual learning and presents some suggestions for ways to design learning environments that support students in developing visual literacy skills. Three visual datasets that can be used for problem solving activities in evolution, classification, development, and botany are included: Caminacules: A dataset of imaginary animals that can be used as the basis for a variety of problem-posing and problem-solving activities in evolution, classi
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Phylogenetic Investigator
Phylogenetic Investigator (PI) is a software package designed to facilitate creative problem-solving in phylogenetic analysis for the purpose of teaching and learning phylogenetic inference. Users can identify characters and states, polarize characters, and engage in directed-search phylogenetic tree construction. PI also allows the user to * make inferences and represent them one step at a time * vary representational features of their trees (such as angle of divergence and time betwee
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Slope (m) of a line (Coordinate Geometry)
An interactive applet and associated web page that demonstrate the slope (m) of a line. The applet has two points that define a line. As the user drags either point it continuously recalculates the slope. The rise and run are drawn to show the two elements used in the calculation. The grid, axis pointers and coordinates can be turned on and off. The slope calculation can be turned off to permit class exercises and then turned back on the verify the answers. The applet can be printed as it appear
Author(s): John Page

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Distance from a point to a vertical or horizontal line
An interactive applet and associated web page that demonstrate how to find the perpendicular distance between a point and a line that is either vertical or horizontal, given the coordinates of the point and the equation of the line. The user can set the orientation of the line and position, along with the location of the point. As the line is altered or the point dragged, the distance is recalculated. The grid and coordinates can be turned on and off. The distance calculation can be turned off t
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A special report on pensions
People in rich countries are living longer. Without big reforms they will not be able to retire in comfort, says Philip Coggan
Author(s): The Economist

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Koch's Crickets: A Study in Etiology
Students apply Koch's Postulates in an attempt to discover the causative agent of "Pink Plague" a disease that has struck a group of commercially raised crickets. During the course of this exercise the students will isolate the suspected pathogen from one of a group of infected crickets. They will then characterize the isolated organism and use it to infect a new group of crickets to see if they can reproduce the same symptoms in the newly infected group. Reisolation of the suspected pathogen fr
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