How to Write an Introduction for an Essay
Learn how to write an introduction for an essay in this clip.  A writing instructor gives tips on how to write the introduction of an essay. 

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Introduction to One-Step Equation with Addition
The goal, as always, is to isolate or "solve for" the variable. You can
undo any addition or subtraction using inverse operations.   An example problem is shown and solved using a marker on the screen.  Loud music plays in the background of this video that distracts from the math problem.



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Introduction to the Digestive System
Professor George Wolfe introduces the structure and function of the digestive system in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in explanations. Run time 11:04.
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Introduction to Audacity-part 1
In this video you learn how to download audacity. Audacity is used to create podcasts and to edit audio files. Created by a Google Certified educator.
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An Introduction to Insect Collecting
Join entomologist Gary Hevel in this video as he helps you start an insect (bug) collection.  Gary will show you the various equipment and supplies needed before starting the collection. Run time 02:40.
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Introduction to Video Production (#1)
All you really need is a computer, a camera and some video editing tools.  You will learn skills needed to create a video.  You will work through pre-production, production and post-production.
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Video Production-Project Introduction (#2)
A project is the best way to learn! Work with this crew to see what they did, and it will help you to create your own video without making some of the usual mistakes and maybe even help you add a few special features. (7:09)

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Introduction to Using Wordle
This tutorial introduces you to the website "Wordle." Wordle allows your to create and edit your own word cloud. You will learn how to change the color scheme, orientation, and font of your word cloud.  You can set the account to private so that no one can access your creations.
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Sodium, an informative introduction
This video provides a few interesting reactions using sodium.  The scientists narrate the video well, explaining the reaction as it is happening.  By the end of the video, students will have a good understanding of sodium, its properties, and uses.
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An Introduction to Biology
Professor George Wolfe gives an introduction to biology in this video from Thinkwell's online Biology series. "In biology, you get to see the big picture for the first time. Biology is a kaleidoscope that mixes all of the sciences." Run time 03:56.
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Sensory Systems: An Introduction
Professor George Wolfe introduces sensory systems in this video from Thinkwell's online Biology series. In biology, you need to get rid of what you remember about your 5 senses from preschool, and learn it in a new way. Sensing is actually biochemistry. All of your senses revolve around receptors. This video is done in lecture format using a white board. Run time 14:12.
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The Light Reactions: An Introduction
Professor George Wolfe discusses an introduction to the light reactions in this video from Thinkwell's online Biology series. The video uses lecture format and a whiteboard to aid in the explanations. Run time 08:27.
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Lipids: An Introduction
Professor George Wolfe gives an introduction to lipids in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in the explanation of lipids. Run time 08:30.
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The Heterotroph Hypothesis: An Introduction
Professor George Wolfe discusses an introduction to the heterotroph hypothesis in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in the explanation of the heterotroph hypothesis.  Run time 07:57.
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Introduction to the Gas Exchange of Animals
Professor George Wolfe introduces the gas exchange of animals in this video from Thinkwell's online Biology series. The video uses lecture format and a whiteboard to aid in the explanations. Run time 12:56.
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Nucleic Acids: An Introduction to Genetic Material
Professor George Wolfe gives an introduction to genetic material in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in the explanations. Run time 10:49.
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Introduction to Animals: Parazoa and Radiata
Professor George Wolfe discusses parazoa and radiata in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in the instruction. Run time 14:13.
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An Introduction to Hardy-Weinberg Theory
Professor George Wolfe introduces the Hardy-Weinberg theory in this video from Thinkwell's online Biology series. This video uses lecture format and a whiteboard to aid in the explanations.  Run time 09:31.
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Mobl21 - Introduction
21st Century e-Teacher Chris Jones introduces the power of mobile learning by using the Mobl21 authoring and distribution application. Run time 01:03.
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Lecture 1 - Introduction to Robotics (1 of 16)
Though this is an entry-level university course, there may be high school students who desire to enter into the field of Robotics, and this course may inspire them.

Lecture by Professor Oussama Khatib for Introduction to Robotics (CS223A) in the Stanford Computer Science Department.

In the first lecture of the quarter, Professor Khatib provides an overview of the course.

CS223A is an introduction to robotics which covers topics such as Spa
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