Adding Integers with a Number Line
Instructor uses an interactive white board to show to use a number line to aid in the addition of integers. This video does add with negative numbers. Clear lecture and good examples. (6:29)
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How to Use the Quadratic Formula to Solve Algebraic Equations
Using the quadratic formula to solve equations may bring one, two, or no algebraic solutions. The quadratic formula is special to quadratic equations. Run time 03:24.
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Ways to Determine a Prime Number
A prime number is a positive whole number with exactly two
factors, which are one and itself. A math teacher shows how to use multiplication tables and factor trees to help determine if a number is a prime number.

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Applications of Linear Equations
This video clip describes how math is applied to the real world situations through word problems. The applications of linear equations are seen throughout all our math courses after Algebra. To understand applications of linear equations we need to have an understanding of slope, how to interpret a graph, and how to write an equation. In upper-level Algebra, we apply systems of linear equations to these problems as well. (1:45)
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The Largest Flower in the World; Titan Arum
In this video, suitable for all grades, David Attenborough looks at one of the largest flowering plant in the world, if not THE largest flowering plant. Wouldn't you think a plant this large would emit a wonderful fragrance? It is sometimes called a Corpse Flower because the smell is that of a rotting corpse.
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Desert Biome
The desert biome is characterized by low precipitation, a high rate of evaporation (seven to fifty times as much as precipitation), and a wide daily range in temperature. The dramatic temperature fluctuations are the result of low humidity, which allows up to 90 percent of solar radiation to penetrate the atmosphere and heat the ground during the day, then for this accumulated heat to be released back into the atmosphere at night. Precipitation in deserts, unlike other biomes, is highly irregula
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SAT Prep: Test 5, Section 7, Part 1
Students, improve your math SAT score! The instructor uses an electronic chalkboard to model problems.  This video is appropriate for high school students. Uses a textbook (the official SAT study guide) commonly found in bookstores, but it is not absolutely necessary as the narrator does all work on the screen. Problems 1-5 starting on page 669.
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From Seed to Flower
The growth and development of a plant is one of the most spectacular events in nature. Yet, because it happens so slowly, over the course of days or weeks, it is difficult to observe in real time. This video segment depicts plant growth in time-lapse format, allowing the viewer to observe in just a few seconds some of the most important life stages of a plant, from germination to the formation of a flower, and several phases in between. Footage from NOVA: "The Shape of Things." Set to music.  N
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Picky Preschool Eaters
What you can do to help picky eaters eat more healthfully.
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Pop Quiz: Parent Involvement
How well are you doing at being involved in your child's education?
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How Music Works 2 - Rhythm - Part 1
Narrator is Howard Goodall.  Rhythm is the maverick in the musical toolbox, even without melody, harmony, or bass line a rhythm can stand by itself.  Rhythm is the part of music that interacts the most immediately and spontaneously with our body.  What is it about rhythm that makes is so great?  Rhythm can make us tap our feet, it can also be complex.  The beat is the heart of rhythm.  Video discusses the rhythm in classic music.   Video a
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Using a Function Machine to Create a Math Rule
The video appears dark because the instructor has a projector on in a darkened room. However, the information is demonstrated fairly well. The teacher shows how to use the function machine to find the unknown rule to a set of number pairs by investigating the pattern. (1:21)
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Calculating Curl in Calculus (Part 2)
The instructor in this video, Sal Khan, discusses the mechanics of calculating curl. Mr. Khan uses the Paint Program (with different colors) to model several examples.
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Calculus-Curl, Part 3
The instructor in this video, Sal Khan, continues his discussion of vector theory and curl. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Chemistry: A House With No Foundation
If abstract fundamental ideas are not taught because students are considered too young to comprehend them, how will older students have the foundation of facts they need to build on? This innovative workshop for teachers explores the reasons why teaching science is so difficult and offers practical advice to help you teach more effectively.
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Earth's Changing Climate
Tropical glaciers are the world's thermometers; their melting is a signal that human activities are warming the planet. A California project tries to predict whether natural ecosystems will be able to absorb enough additional carbon dioxide from the atmosphere in the next 50 years to mitigate the full impact of human-induced greenhouse gas emissions.
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Looking Forward: Our Global Environment
Earth's essential systems are being stressed in many ways. There are many tipping points in the environment, beyond which there could be serious consequences. Will human ingenuity, resiliency, and cooperation save us from the worst outcomes of our global experiment?
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This program follows a number of classrooms as they try to find the exact location of 10 secret Mystery Classes located around the world. To guide the investigation, they track changes in day length a the mystery sites and at their hometown, and use other "clues".

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Workshop 2: Intellectual Development
Explore the power of the mind and consider the notion that every child can learn everything. Harvard Professor Eleanor Duckworth discusses the importance of teaching for a deep and lasting understanding and explains why it is important to give students time to work through their own ideas and experience confusion in order to achieve such understanding.
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History of Electric Light Bulb
The electric light bulb revolutionized the world. Many people tried to invent one, but Thomas Edison succeeded. This video is about how he did it.
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