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Congruent Polygons
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An interactive applet and associated web page that demonstrate the congruence of ...

An interactive applet and associated web page that demonstrate the congruence of polygons. The applet presents nine polygons that are in fact congruent, but don't look it because they are reflected and rotated in various ways. If you click on one, it rotates and flips as needed, then slides over the top of another to show it is congruent. The web page describes how to determine if two polygons are 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.

Subject:
Geometry
Material Type:
Readings
Simulations
Provider:
Math Open Reference
Provider Set:
Math Open Reference
Author:
John Page
Angle bisector
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An interactive applet and associated web page that demonstrate the bisector of ...

An interactive applet and associated web page that demonstrate the bisector of an angle. An angle is shown using two line segments that can be dragged to change the angle measure. The angle is bisected by a line which moves while dragging to always divide the angle into two equal angles. The angle measures can be turned off for class discussions. 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.

Subject:
Geometry
Material Type:
Readings
Simulations
Provider:
Math Open Reference
Provider Set:
Math Open Reference
Author:
John Page
Finding the center of a circle (with compass and straightedge)
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An interactive applet and associated web page that provide step-by-step instructions on ...

An interactive applet and associated web page that provide step-by-step instructions on how to find the center of a circle using only a compass and straightedge. The method used involves constructing the perpendicular bisectors of two random chords. The bisectors intersect at the center of the circle. 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.

Subject:
Geometry
Material Type:
Readings
Simulations
Provider:
Math Open Reference
Provider Set:
Math Open Reference
Author:
John Page
Dilating Triangles
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Objectives: Determine how the scale factor affects the properties of the original ...

Objectives: Determine how the scale factor affects the properties of the original shape. Compare Areas and perimeters of the two shapes. Determine the difference between similarity and congruence.

Subject:
Geometry
Material Type:
Simulations
Provider:
GeoGebra
Provider Set:
GeoGebraTube
Fraction Model III
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This tool allows the individual or the classroom to explore several representations ...

This tool allows the individual or the classroom to explore several representations of fractions. After selecting numerator and denominator, any number from 1 to 100, learners see the fraction itself, a visual model, as well as decimal and percent equivalents. They can choose the model to be a circle, a rectangle, or a set model.

Subject:
Education
Mathematics
Numbers and Operations
Material Type:
Activities and Labs
Instructional Material
Simulations
Teaching and Learning Strategies
Provider:
National Council of Teachers of Mathematics
Ohio State University College of Education and Human Ecology
Provider Set:
Illuminations
Middle School Portal: Math and Science Pathways (MSP2)
Author:
NCTM Illuminations
Irrational Numbers on the Number Line
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When students plot irrational numbers on the number line, it helps reinforce ...

When students plot irrational numbers on the number line, it helps reinforce the idea that they fit into a number system that includes the more familiar integer and rational numbers.

Subject:
Education
Mathematics
Material Type:
Activities and Labs
Instructional Material
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
Music and Sports
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In this group task students collect data and analyze from the class ...

In this group task students collect data and analyze from the class to answer the question "is there an association between whether a student plays a sport and whether he or she plays a musical instrument? "

Subject:
Education
Mathematics
Statistics and Probability
Material Type:
Activities and Labs
Instructional Material
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
100,000,000 Guinea Pigs : The Dangers of Consumption
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In 1927, responding to the seemingly overpowering claims of advertisers and mass ...

In 1927, responding to the seemingly overpowering claims of advertisers and mass marketers, engineer Frederick Schlink and economist Stuart Chase published Your Money's Worth, which argued for an "extension of the principle of buying goods according to impartial scientific tests rather than according to the fanfare and triumphs of higher salesmanship." Your Money's Worth became an instant best-seller, and the authors organized Consumers' Research, a testing bureau that provided information and published product tests in a new magazine, Consumers' Research Bulletin. The 1929 stock market crash heightened suspicion of consumer capitalism, and the magazine had 42,000 subscribers by 1932. In 1933, Schlink and Arthur Kallet (executive secretary of Consumers' Research) published 100,000,000 Guinea Pigs: Dangers in Everyday Foods, Drugs, and Cosmetics. The book struck a responsive chord in depression-era America--it went through thirteen printings in its first six months and became one of the best-selling books of the decade. The book's first chapter ("The Great American Guinea Pig"), gave a flavor of their vigorous arguments.

Subject:
Arts and Humanities
U.S. History
Material Type:
Primary Source
Readings
Provider:
American Social History Project / Center for History Media and Learning
Provider Set:
Many Pasts (CHNM/ASHP)
Author:
Center for History and New Media/American Social History Project
CTE Health Sciences: BMI Calculations
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This task was developed by high school and postsecondary mathematics and health ...

This task was developed by high school and postsecondary mathematics and health sciences educators, and validated by content experts in the Common Core State Standards in mathematics and the National Career Clusters Knowledge & Skills Statements. It was developed with the purpose of demonstrating how the Common Core and CTE Knowledge & Skills Statements can be integrated into classroom learning - and to provide classroom teachers with a truly authentic task for either mathematics or CTE courses.

Subject:
Health, Medicine and Nursing
Algebra
Ratios and Proportions
Statistics and Probability
Material Type:
Activities and Labs
Lesson Plans
Provider:
National Association of State Directors of Career Technical Education Consortium
Provider Set:
Career Technical Education