Charles Babbage and his Difference Engine
This video provides a demonstration of the first automatic computing engine invented by Charles Babbage - the Difference Engine. See the first machine that appeared to think... The Analytical Engine is also shown in this brief video. A modern working version is shown in this video. (5:47)
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Charles Babbage's Difference Engine
A professionally-produced video about Charles Babbage's "Difference Engine" and "Analytical Engine"--early progenitors of computers. (5:48)
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Dhaka, the second dirtiest city in the world - 19 April 08
Bangladesh's capital Dhaka, home to some 11million people, is facing a severe environmental crisis. It's been named the second dirtiest city in the world, after Baku in Azerbaijan.
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A case study of "A Civil Action"
This is a short, culminating activity that can be used to assess your students' understanding of the steps needed to determine if a water source is contaminated and how it got that way, and to suggest possible methods of cleanup or remediation. Students review a portion of the film "A Civil Action" and identify the problem and the people involved. Students then take the role of environmental scientist and apply their knowledge of water and hazardous waste contamination to create a plan to help l
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Learn English Through Song- Lesson 30- Monologue
Learn English Through Song "Engine, Engine Number Nine" by Roger Millerl. Learn English Through Song helps English Second Language (ESL) students study speaking, conversation, vocabulary, pronunciation, listening and grammar.  In this musical slide show with images the the lyrics are shown for Engine, Engine Number Nine  to teach monologue from the lyrics.  More songs at learn-to-speak-english-esl.com.


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Better Search Techniques
Step 1: Go to an internet search engine
The most popular search engine is Google
Step 2: Choose several key words

Step 3: Search for one of 2 or more terms
If you would like to find pages that contain at least one of your search terms, but not necessarily all of them, put the word OR in capitals between them.
Step 4: Performing a negative search
If you would like to find pages that do not contain one of your s

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A Good Site for Searching PDF Files
PDF Search Engine http://www.pdfsearchengine.in
This is a brief slideshow (6 slides) that shows students how to get Faster, more Relevant results if searching for PDF files. This search engine returns results from these search engines: Google, Bing, and Yahoo! 
(There is also another website: pdf-search-engine.com which is powered by Google.)

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Congressional Briefing: WASH in Schools in Developing Countries
Experts discuss the assessment of environmental standards at water sanitation facilities.
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Tree Identification
In this video from the WPSU’s series Outside, a staff member at Shaver’s Creek Environmental Center at Penn State University explains how being able to identify trees can make a winter walk through the woods more enjoyable. First, you can classify a tree into one of two groups: a conifer that holds its leaves or needles year round, or a deciduous tree that drops leaves annually. Next, observe each tree's characteristics: the type of bark, the branching pattern of a twig, the shape of a bud,
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Recycling : How and Where Is Glass Recycled?
After being taken to a storage location, recycled glass is taken to a glass re-manufacturing facility, where it is crushed and sorted by color. Discover how recycled glass is melted and remade with help from a solid waste planning engineer and recycling program coordinator in this video on glass recycling.

Lynn Bestul is the solid waste planning engineer and recycling program coordinator for the New Hanover Department of Environmental Management in Wilmington, N.C.
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Turtle Defenses
In this video from the WPSU’s series Outside, a staff member from Shaver’s Creek Environmental Center at Penn State University explains how some species of turtle protect themselves in their environment. Turtles, like many other species, are facing obstacles that threaten their survival. Some of these obstacles have threatened turtle survival for centuries, while others have emerged more recently and are caused by human activities. Closed captioning included. Run time 02:32.
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Biomes Interactive Site
The distribution of plants and animals around the world is anything but random. Instead, it is a result of the interplay of individual environmental tolerances of species and the environmental conditions, especially variations in temperature and precipitation. These interactions result in biomes, the categories into which ecologists organize similar communities of plants, animals, and the environmental conditions in which they live. This interactive resource adapted from NASA features some of th
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Chemicals, the Environment, and You
provides lessons for learning about the relationship between chemicals in the environment and human health. Topics include the science of toxicology, dose-response relationships, individual susceptibility, risk assessment, and environmental hazards. Students are introduced to the ever-changing nature of our understanding of how chemicals influence the health of living organisms.
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Jack Johnson: Reduce, Reuse, Recycle - 3 R Song
"Three is a magic number." The students of Sunset Beach Elementary School sing along with Jack Johnson in a group rendition of 'Reduce, Reuse, Recycle.' Environmental education is crucial to the preservation of Hawaii - and the planet.
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Environmental Attorney Career
Explains the importance of environmental attorneys in protecting the environment by making the government enforce environmental law. Tells what is required of environmental attorneys in their daily jobs. Color video with sound. 3:12 min.
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Climb the Green Ladder: how sustainability can make you and your company more successful
What strategies can individuals within organisations use to make their organisation more successful and sustainable? Ed Gillespie is the co-founder and creative director of Futerra Sustainability Communications. Futerra arose from the frustration of its co-founders, in the late 1990’s, with the unsophisticated communications around sustainable development, and the dull and worthy messaging of corporate social responsibility. Supported by a grant from the National Endowment for Science, Technol
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M.C. Mehta Part 1 of 2
M.C. Mehta is one of India's foremost environmental lawyers. Mehta is a crusader for India's environment, leading the legal fight to clean up
the Ganges, save the Taj Mahal from acid rain, and prevent industrial
companies from polluting ground water. Join Charles Annenberg Weingarten in this fascinating talk with Mehta.

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Using sound deadening material
This Teach Me topic explains about sound deadening material and how it is used on floor pans, doors and bonnet and boot lids to reduce road and engine noise and vibrations.
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The Life of a Tree
In this interactive activity adapted from the National Arbor Day Foundation, explore the intricate life of a tree. The trunk of a tree functions as both a supporting structure and a pathway, transporting food down from the photosynthesizing leaves and conducting water and minerals up from the roots. Look inside a tree to learn about the xylem, cambium, and phloem, and to see how the tree's rings provide a record of the environmental factors that affected its growth and life cycle.
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Backyard Birdfeeders
In this video from WPSU’s Outside, a staff member at Shaver’s Creek Environmental Center at Penn State University provides tips on backyard bird feeding during the winter. Topics include the selection, placement, and cleaning of feeders. To attract birds for viewing, and to contribute to their welfare, it is important to understand their needs and behaviors. Placing a bird feeder close to a window will prevent collisions with glass. Offering seeds and suet can provide birds with the energy t
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