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AAS Congruent Triangles
Conditions of Use:
Read the Fine Print
AAS Congruent Triangles
Rating

An interactive applet and associated web page that shows how triangles that have two angles and a non-included side the same must be congruent. The applet shows two triangles, one of which can be reshaped by dragging any vertex. The other changes to remain congruent to it and the two angles and non-included side are outlined in bold to show they are the same measure and are the elements being used to prove congruence. The web page describes all this and has links to other related pages. 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:
Reading
Simulation
Provider:
Math Open Reference
Author:
John Page
Date Added:
02/16/2011
MoreLess
Alpha Decay (AR)
Conditions of Use:
Read the Fine Print
Alpha Decay (AR)
Rating

Watch alpha particles escape from a polonium nucleus, causing radioactive alpha decay. See how random decay times relate to the half life.

Subject:
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Noah Podolefsky
Ron LeMaster
Sam McKagan
Wendy Adams
Date Added:
09/02/2012
MoreLess
Application of Derivatives
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
Application of Derivatives
Rating

We use the derivative to determine the maximum and minimum values of particular functions (e.g. cost, strength, amount of material used in a building, profit, loss, etc.).Differentiation is also used in analysis of finance and economics.

الموضوع:
Finance
هندسة الشكل
نوع المادة:
محاكاة
Provider:
GeoGebra
Provider Set:
موقع GeoGebraTube
Date Added:
03/12/2012
MoreLess
Balloons & Buoyancy (AR)
Conditions of Use:
Read the Fine Print
Balloons & Buoyancy (AR)
Rating

Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Kathy Perkins
Ron LeMaster
Date Added:
07/02/2009
MoreLess
The Broken Stick Experiment: Triangles, Random Numbers and Probability
Conditions of Use:
Remix and Share
The Broken Stick Experiment: Triangles, Random Numbers and Probability
Rating

This learning video is designed to develop critical thinking in students by encouraging them to work from basic principles to solve a puzzling mathematics problem that contains uncertainty. Materials for in-class activities include: a yard stick, a meter stick or a straight branch of a tree; a saw or equivalent to cut the stick; and a blackboard or equivalent. In this video lesson, during in-class sessions between video segments, students will learn among other things: 1) how to generate random numbers; 2) how to deal with probability; and 3) how to construct and draw portions of the X-Y plane that satisfy linear inequalities.

Subject:
Measurement and Data
Material Type:
Lecture
Provider:
MIT
Provider Set:
MIT Blossoms
Author:
Richard C. Larson
Date Added:
10/31/2014
MoreLess
Conductivity (AR)
Conditions of Use:
Read the Fine Print
Conductivity (AR)
Rating

Experiment with conductivity in metals, plastics and photoconductors. See why metals conduct and plastics don't, and why some materials conduct only when you shine a flashlight on them.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Kathy Perkins
Sam McKagan
Sam Reid
Wendy Adams
Date Added:
07/01/2004
MoreLess
Density (AR)
Conditions of Use:
Read the Fine Print
Density (AR)
Rating

Why do objects like wood float in water? Does it depend on size? Create a custom object to explore the effects of mass and volume on density. Can you discover the relationship? Use the scale to measure the mass of an object, then hold the object under water to measure its volume. Can you identify all the mystery objects?

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Carl Wieman
Chris Malley
Jonathan Olson
Kathy Perkins
Kelly Lancaster
Noah Podolefsky
Patricia Loblein
Sam Reid
Wendy Adams
Date Added:
09/01/2010
MoreLess
Double Wells and Covalent Bonds
Conditions of Use:
No Strings Attached
Double Wells and Covalent Bonds
Rating

Explore tunneling splitting in double well potentials. This classic problem describes many physical systems, including covalent bonds, Josephson junctions, and two-state systems such as spin 1/2 particles and ammonia molecules.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
Date Added:
10/04/2006
MoreLess
الهندسة الكسيرية والمعادلات التفاضلية الرائعة
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
الهندسة الكسيرية والمعادلات التفاضلية الرائعة
Rating

يقوم هذا الفيديو التعليمي بتعريف الطلاب على عالم الهندسة الكسيرية من خلال استخدام المعادلات التفاضلية. وكشرط مسبق لهذا الدرس، سيحتاج الطلاب إلى عامين من دراسة جبر المرحلة الثانوية (بحيث يكونوا مرتاحين مع معادلات المتغير الواحد)، وكذلك إلى دافع لتعلم الحسابيات المعقدة الأساسية. وقد قامت الآنسة زاجر بتضمين شرح تقديمي كامل حول الحسابيات المعقدة بالإضافة إلى فروض منزلية متاحة هنا للتنزيل. كذلك متاح تنزيل بعض مسائل التحدي الإضافية. علماً بأن الوقت اللازم لإكمال الدرس الأساسي هو ساعة تقريباً، والمواد المطلوبة تشمل: سبورة ومكان للطلاب ليعملوا في مجموعات صغيرة. وخلال أقسام هذا الدرس التفاعلي داخل الفصل، سيقوم الطلاب بالتفكير المكثف حول محصلة لعبة الفوضى، ويمارسوا حساب مسارات معادلات مختلفة.

الموضوع:
هندسة الشكل
نوع المادة:
Lecture
Provider:
MIT
Provider Set:
أزهار معهد ماساتشوستس للتكنولوجيا MIT
المؤلف:
Laura Zager
Date Added:
07/12/2014
MoreLess
صور نمطية هندسية متكررة رائعة ومعادلات الفرق
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
صور نمطية هندسية متكررة رائعة ومعادلات الفرق
Rating

يعرف هذا الفيديو التعليمي الطلاب على عالم الهندسة الكسورية من خلال استخدام معادلات الفرق. كشرط مسبق لهذا الدرس، فإن الطلاب بحاجة الى قضاء عامين في دراسة علم الجبر بالمدرسة الثانوية (الارتياح مع استخدام المعادلات ذات المتغير الواحد) والحافز لتعلم العمليات الحسابية الأساسية المركبة. أدرجت الآنسة زاجر برنامج تعليمي تمهيدي كامل حول الحساب المركب مع الواجبات المنزلية متوفر للتحميل هنا. كذلك متوفر للتحميل بعض مسائل التحدي الإضافي. ان الوقت المطلوب لإكمال الدرس الأساسي هو ساعة واحدة تقريبا، وتتضمن المواد اللازمة السبورة السوداء / السبورة البيضاء وكذلك مساحة للطلاب للعمل ضمن مجموعات صغيرة. أثناء الأوقات المستقطعة من الحصة بهذا الدرس التفاعلي، سيطرح الطلاب الافكار حول نتائج لعبة الفوضى و سيمارسون حساب مسارات المعادلات المختلفة.

الموضوع:
هندسة الشكل
نوع المادة:
Lecture
Provider:
MIT Learning International Networks Consortium
Provider Set:
M.I.T. Blossoms
المؤلف:
Laura Zager
Date Added:
06/02/2012
MoreLess
Figure This! Math Challenges for Families
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Figure This! Math Challenges for Families
Rating

This web site offers families, teachers, and tutors 80 mathematical challenges helpful for encouraging problem solving with students in grades 6 to 8. The math challenges focus on concepts and objects found in everyday life, such as how fast your heart beats, what shape container holds the most popcorn, and how much of me shows in a mirror. Each challenge contains an initial problem with a solution hint, a complete explanation of the answer, and additional problems related to the same challenge. Resources for further investigations are suggested as well. From the Printing the Challenges link on the homepage, PDF files are available for all 80 challenges in English, the first 15 challenges in Spanish, and the family resource materials in English and Spanish.

الموضوع:
علم الجبر
هندسة الشكل
الإحصائيات والاحتمالات
نوع المادة:
Activity/Lab
Homework/Assignment
Provider:
المجلس الوطني لمدرسي الرياضيات
Provider Set:
تعرف على هذا!
Date Added:
01/01/2002
MoreLess
Friction (AR)
Conditions of Use:
Read the Fine Print
Friction (AR)
Rating

Learn how friction causes a material to heat up and melt. Rub two objects together and they heat up. When one reaches the melting temperature, particles break free as the material melts away. Arabic Language.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Michael Dubson
Mindy Gratny
Wendy Adams
Date Added:
06/02/2008
MoreLess
Gas Properties
Conditions of Use:
No Strings Attached
Gas Properties
Rating

Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Jack Barbera
Kathy Perkins
Linda Koch
Michael Dubson
Ron LeMaster
Date Added:
10/05/2006
MoreLess
Gas Properties (AR)
Conditions of Use:
Read the Fine Print
Gas Properties (AR)
Rating

Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other.

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Jack Barbera
Kathy Perkins
Linda Koch
Michael Dubson
Ron LeMaster
Date Added:
07/02/2009
MoreLess
General Chemistry I
Conditions of Use:
Read the Fine Print
General Chemistry I
Rating

This survey chemistry course is designed to introduce students to the world of chemistry. In this course, we will study chemistry from the ground up, learning the basics of the atom and its behavior. We will apply this knowledge to understand the chemical properties of matter and the changes and reactions that take place in all types of matter. Upon successful completion of this course, students will be able to: Define the general term 'chemistry.' Distinguish between the physical and chemical properties of matter. Distinguish between mixtures and pure substances. Describe the arrangement of the periodic table. Perform mathematical operations involving significant figures. Convert measurements into scientific notation. Explain the law of conservation of mass, the law of definite composition, and the law of multiple proportions. Summarize the essential points of Dalton's atomic theory. Define the term 'atom.' Describe electron configurations. Draw Lewis structures for molecules. Name ionic and covalent compounds using the rules for nomenclature of inorganic compounds. Explain the relationship between enthalpy change and a reaction's tendency to occur. (Chemistry 101; See also: Biology 105. Mechanical Engineering 004)

Subject:
Chemistry
Material Type:
Assessment
Full Course
Homework/Assignment
Lecture
Lecture Notes
Reading
Syllabus
Textbook
Provider:
The Saylor Foundation
Date Added:
11/16/2011
MoreLess
Guess the Last Ball
Conditions of Use:
Remix and Share
Guess the Last Ball
Rating

This video lesson uses the technique of induction to show students how to analyze a seemingly random occurrence in order to understand it through the development of a mathematical model. Using the medium of a simple game, Dr. Lodhi demonstrates how students can first apply the 'rules' to small examples of the game and then, through careful observation, can begin to see the emergence of a possible pattern. Students will learn that they can move from observing a pattern to proving that their observation is correct by the development of a mathematical model. Dr. Lodhi provides a second game for students in the Teacher Guide downloadable on this page. There are no prerequisites for this lesson and needed materials include only a blackboard and objects of two different varieties - such as plain and striped balls, apples and oranges, etc. The lesson can be completed in a 50-minute class period.

Material Type:
Lecture
Provider:
MIT Learning International Networks Consortium
Provider Set:
M.I.T. Blossoms
Author:
Fakhar Lohdi
Date Added:
06/02/2012
MoreLess
I Spy Nano!
Conditions of Use:
Remix and Share
I Spy Nano!
Rating

In this game, learners try to find nano-related objects on a game board. Learners investigate the different ways nano is in the world around us.

Subject:
Engineering
Education
Life Science
Mathematics
Chemistry
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Game
Reading
Provider:
Nanoscience Informal Science Education
Science and Math Informal Learning Educators (SMILE)
Provider Set:
NISE Network
SMILE Pathway: Science and Math Activities in One Search
Author:
Nanoscale Informal Science Education Network
National Science Foundation
NISE Network
Date Added:
01/02/2011
MoreLess