The instructor uses an electronic chalkboard to demonstrate how to bisect a line segment.Â  One example is modeled using astep by step approach to walk the learner through the process of bisecting the line segment by using a compass and ruler.

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Constructing a Perpendicular
The shortest distance between a point not on a line and a line is along the perpendicular to the line. This video describes how constructing a perpendicular to a line uses the same process as constructing the perpendicular bisector of a line segment, but with one additional step. The first step is to swing an arc from the point and intersect the line in two places, which creates a segment that can be bisected. (2:06)
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American Falls from Above-American Side
From the LOC collection-Part of Edison's "New Niagara Falls series: The following subjects were all taken on the latest and most improved clear stock during December 1896, and should not be confounded with former negatives, which were not entirely satisfactory."
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Learn To Write Numbers 0 to 20
Models of writing numerals from zero to 20.  Arrows and dots are used to show students how to form the numerals. Graphics and animation are very clear and well paced.  When the numeral is complete, a graphic comes up with the number of objects the numeral represents.  D'Neilian style is used. (6:57)

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Expanded Notation - by StudyJams
Expanded notation, also called expanded form, is a handy way to write numbers that shows the place value of each digit.  It looks like an addition problem and will help you break numbers down and understand their place value.  Learn more about expanded notation with this step-by-step, interactive video from StudyJams.  A short, self-checking quiz is also included with this link.
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Potential Energy: Wile E Coyote & Roadrunner
Excellent examples of elastic and gravitational potential energy are then converted to kinetic energy, as shown in this classic Roadrunner episode. (01:23)
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Acting Tips : Basic Emotions
The basic emotions are crucial to portray in a realistic way as the foundation of being a good actor. Practice mastering basic emotional responses. (2:11)
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Homes and Houses
This video is a slide show that presents vocabulary related to homes, houses and buildings. The words are written and and read out twice.
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Discovery Kids - Doki Descubre - Los Planetas
This one-minute animated Spanish video offers information to younger learners about the planets in our Solar System.
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How to Read and Make Pictographs
This whiteboard presentation show student how to make and interpret pictographs.  The teacher narrator begins with a data chart and shows students how to create a pictograph.  In the second section, the off-screen teacher shows how to use a pictograph to solve a word problem.  This is a great resource to introduce or to re-teach this important skill. (5:57)
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Tally Charts and Frequency Tables
In this whiteboard presentation, the teacher narrator shows how to create a tally chart and then use the tally chart to create a frequency chart. Â Next, the teacher demonstrates how to answer the word problem using the frequency table. Â
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Preschool Activities For Learning-Hand Eye Co-Ordination Pre K Activities
Preschool activities and pre k early learning development activities for children and toddlers to increase hand eye co-ordination skills.
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only, but now the Internet plays an integral role in the field of
broadcasting the news through blogs, videos and station Web sites.
A former TV news anchors explains the the definition of broadcast journalism with insider information in this clip.Â  Words shown on bottom of screen as we see the head shot of the CEO speaking.Â  (1:13)

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Web Site Evaluation
Short video shows how to evaluate a web site for quality. It discusses all the important points for evaluating a website for crediability. (1:53)
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Evaluating Web Sources with the Library Fairy
Students at St. Kate's learn about evaluating web sources with the beloved Library Fairy. They learn that you need to check how current the page is, who is the authority behind the page, is the page accurate, and to check for bias. (1:55)
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Evaluating Websites
This video is in a PowerPoint style.Â  It discusses how to evaluate websites for accuracy. (7:08)
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Evaluating Web Sites Tutorial
This tutorial covers how to evaluate websites for credibility. It discusses the differences between the different domains and how to check to get the best information.
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Web Search Strategies in Plain English
This animated video with a few live action scenes from Common Craft describes a few simple strategies including the use of quotation marks around phrases and the minus sign to exclude words from results.
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Using an Asterisk in Google Search
Explains how the * is used in a Google search as a placeholder. Would be good to show students more advanced searching techniques. Grades 7-12. 2:18 min.
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A Video of Molecules
This video shows how various molecules look. For example, water consisting of two hydrogen atoms and one oxygen atom.

The others are: glucose, sucrose, amylose, stearic acid, oleic, glycerol, trigglyceride, phospholipid, alenine, serine, leucine, phenyaleine, hexapeptide, peroxide, dioxiribose, thymine, atp, dna, amylpectin and cellulose.

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