Parallel lines. (Coordinate Geometry)
An interactive applet and associated web page that demonstrate the properties of parallel lines in coordinate geometry. The applet presents two lines, each defined by a pair of draggable points. If they are parallel the slopes are the same and the applet adds the parallel arrow marks to them. The slope of each line is continuously recalculated and the case of vertical lines (with undefined slope) is handled correctly. The is a software 'detent' that snaps the lines to parallel if they are close
Author(s): John Page

The Coordinate Plane
An interactive applet and associated web page that describe the concept of the coordinate plane (Cartesian Plane). The applet shows the plane, its axes, origin and related controls. The user can drag a point around and see the coordinates change, and click anywhere to create new points. The origin can be dragged to emphasize or eliminate certain quadrants. The grid, axis pointers and coordinates can be turned on and off. The coordinate display can be turned off to permit class exercises and then
Author(s): John Page

Coordinates of a point
An interactive applet and associated web page that describe the concept of a point in coordinate geometry. The applet show one point initially, but clicking anywhere adds more. As the points are dragged, the coordinates are seen to change. The grid, axis pointers and coordinates can be turned on and off. The coordinate display can be turned off to permit class exercises and then turned back on the verify the answers. The applet can be printed as it appears on the screen to make handouts. The web
Author(s): John Page

Distance from a point to a line
An interactive applet and associated web page that demonstrate how to find the perpendicular distance between a point and a line. The applet has a line with sliders that adjust its slope and intercept, and a draggable point. As the line is altered or the point dragged, the distance is recalculated. The page actually shows four ways to do it, with links to detail pages on each one. The grid and coordinates can be turned on and off. The distance calculation can be turned off to permit class exerci
Author(s): John Page

Distance from a point to a line using trigonometry
An interactive applet and associated web page that demonstrate how to find the perpendicular distance between a point and a line using trigonometry, given the coordinates of the point and the slope/intercept of the line. The applet has a line with sliders that adjust its slope and intercept, and a draggable 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 to permit class
Author(s): John Page

Rectangle and its properties. (Coordinate Geometry)
An interactive applet and associated web page showing how to find the area and perimeter of a rectangle from the coordinates of its vertices. The rectangle can be either parallel to the axes or rotated. The grid and coordinates can be turned on and off. The area and perimeter 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 appears on the screen to make handouts. The web page has a full description of the meth
Author(s): John Page

Area and Perimeter of a square (Coordinate Geometry)
An interactive applet and associated web page showing how to find the area and perimeter of a square from the coordinates of its vertices. The square can be either parallel to the axes or rotated. The grid and coordinates can be turned on and off. The area and perimeter 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 appears on the screen to make handouts. The web page has a full description of the method for
Author(s): John Page

Area of a triangle using the box method (Coordinate Geometry)
An interactive applet and associated web page that calculate the area of a triangle using the box method in coordinate geometry. The applet has a triangle with draggable vertices. As you drag them the triangle's bounding box is shown and the area recalculated by subtracting the areas of the outside triangles. The grid and coordinates can be turned on and off. The area calculation can be turned off to permit class exercises and then turned back on the verify the answers. The applet can be printed
Author(s): John Page

Solo Acts: Derique
SPARK follows as Derique takes his one-man show from stage to street and back again as an evangelist for the art of "Hambone," a traditional form of body percussion originated by African American slaves in the Old South. This Educator Guide introduces educators to Hambone, explores the evolution of ...
Author(s): Creator not set

The Bleeding Edge: Loren Chasse
Sound artist Loren Chasse seeks out unusual acoustic environments and teaches a class of students about fundamentals of sound. This Educator Guide explores sound and the history of sound as a musical form, extending back to the early 1900s.
Author(s): Creator not set

Plate Tectonics and Contributions from Scientific Ocean Drilling - Going Back to the Original Data
The purpose of this activity is to bring you back to the original discovery and original data of DSDP Leg 3 in the South Atlantic. It is scientific data in its original context.
Author(s): No creator set

Back Pain
This patient education program reviews the anatomy of the back, the most common causes of back pain, and measures to prevent back pain. This resource is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.
Author(s): No creator set

Machines that change climate: Porsche 911 Turbo vs. Toyota Prius
This activity asks students make 'back-of-the-envelope' calculations to estimate the amount of carbon dioxide released to the environment by different types of automobiles. It shows students that decisions they make can significantly alter the amount of greenhouse gases they release to the environment. ...
Author(s): Carleton College Science Education Resource Center

Winter Field Lab: Pond Hydrology
This field activity may be implemented during late winter or early spring when things have not quite thawed. From a frozen pond, students collect bathymetric data, measure water temperature and conductivity, locate ground-water inputs, and extract a sediment core. Back in the lab, they make hand and computer-contoured bathymetric maps, temperature and conductivity cross-sections, and run visual-core log, loss-on-ignition, and magnetic susceptibility tests. Then they draw conclusions about water
Author(s): No creator set

Winter Field Lab: Snow Hydrology
This field activity may be implemented during late winter or early spring when things have not quite thawed. Students collect their own data from a snowpack, including measuring water equivalent, identifying types of snow metamorphism, finding evidence of precipitation patterns, and judging possible snowpack hazards. Back in the lab, students evaluate their data, draw conclusions, and make a report. This activity is designed for upper-level undergraduate and graduate-level geohydrology courses.
Author(s): No creator set

Toilet Paper Analogy for Geologic Time
This in-class demonstration involves using a 1000 sheet roll of strong toilet paper to demonstrate the vast length of time involved in Deep Time. Important events in geologic history are marked on the toilet paper. As the toilet paper is unrolled, from the front of the room to the back and around the room, students begin to get a sense of how little time humanity has been on Earth and how much time is really involved. Learning goals, context for use, teaching tips, materials, assessment tips and
Author(s): No creator set

D-Day Revisited
As America honors heroes who have fought and fallen for their nation, Bill Moyers Journal presents "D-Day Revisited," a special one-hour broadcast which follows a group of World War II veterans back to Europe to speak about their wartime experiences-some of them unlocking memories they had been keeping inside for nearly 50 years. Featuring excerpts from the Bill Moyers' 1990 documentary From D-Day to the Rhine, "D-Day Revisited" includes the latest information about the veterans featured in the
Author(s): No creator set

Overpaid Airline Execs? Plus, Christian Parenti and Bishop Jefferts Schori
Beginning to trade on the NYSE last week, Northwest airlines dodged the bankruptcy bullet. But while a \$1.4 billion a year cut in labor expenses have ensured lower costs, why are airline executives still executives still flying high on salaries, stock options and benefits while workers and retirees see cuts in pay and compensation? Then, with heated debate looming large over progress reports and withdrawal deadlines for Iraq, what's next for Afghanistan? Journalist Christian Parenti, just ba
Author(s): No creator set

Capitalism in crisis.
Is there a crisis in American capitalism? Investment industry giant John Bogle says that as more and more money managers take control over corporations on Wall Street, Main Street is paying the price. Named by Fortune magazine as one of the four "Giants of the 20th Century," Bogle tells Moyers: "The evidence is quite compelling that today corporations are run in a very important way to maximize the returns of its managers at the expense of its stockholders." Also on the program, NPR's Deborah
Author(s): No creator set

Katrina recovery woes
Two years after Katrina, casinos, hotels and condos are coming back strong in the hardest hit areas of Mississippi, but tens of thousands of people are still displaced-in limbo with no solution in sight. Bill Moyers Journal profiles a group known as The Steps Coalition, which is fighting on behalf of families who are still in need of housing, and examines what's happened to the money Congress sent to rebuild. The Steps Coalition argues that Governor Haley Barbour's recovery plan has made it di
Author(s): No creator set