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Vocab Ahead is a great service offering hundreds of videos designed to help students learn SAT and ACT vocabulary words. Each video features a narrator pronouncing the word, reading the definition, and then reading a sentence or two using the vocabulary word. An animated drawing accompanies each sentence to illustrate the meaning of each word and sentence. You can watch the Vocab Ahead videos individually or in a continuous stream. All of the Vocab Ahead videos can be viewed directly on their website or you can embed the Vocab Ahead widget into your own blog or website. Vocab Ahead also gives teachers the ability to create custom playlists of vocabulary videos. The playlists can be shared via email, a posted link on a blog, or by posting a vocabulary video widget on a blog or website

In the history of photography, the leap from film to digital was a breakthrough as profound as the move from black-and-white to color. Photosynth is the first photo site that really capitalizes on that shift, with a new way to look at pictures. Instead of arranging photos in a traditional album, the site finds relationships among pictures and digitally composites them to create an immersive 3-D photo environment called a "synth." The best synths - like this one pieced together from the Apollo moon-landing shots - look like David Hockney himself Read more: http://www.time.com/time/specials/packages/article/0,28804,1918031_1918016_1918005,00.html #ixzz1RRRull6M

Like Google Earth for the heavens, WWT aggregates terabytes of astronomical data from the world's biggest telescopes to create a single virtual scope that anyone can look through. WWT is not a model of the known universe, but rather a centralized repository for just about everything known about the universe. The idea is to democratize the science of astronomy with a single tool that can be used by students and scientists. Who knows, when everyone has access to the same data, maybe the next big discovery in astronomy will be made by an amateur? There are hundreds of terabytes of digitized sky - enough data for everyone Read more: http://www.time.com/time/specials/packages/article/0,28804,1918031_1918016_1918007,00.html #ixzz1RRSH4taN

"Science resource pairs students with real data analysis Read more by eSchool News Staff The student science data program was spurred by the Ocean Observatories Initiative, funded by the National Science Foundation, which puts probes into the ocean and collects data in various forms, said Ruth Krumhansl, the senior research scientist in EDC's Learning and Teaching Division. Krumhansl directs the Oceans of Data Institute."

"a free resource used in over 24,000 schools to enhance vocabulary mastery & written/verbal skills with Latin & Greek roots."

Word web "It's an online interactive English dictionary and thesaurus that helps you find the meanings of words and draw connections to associated words. You can easily see the meaning of each by simply placing the mouse cursor over it."

is a free service that describes itself as "half vocabulary builder, half dictionary, and full awesome." Word Stash is pretty true to its self-description. At its most basic Word Stash is a dictionary that provides contextual examples to support the definitions offered. For many words, Word Stash provides an audio pronunciation. The vocabulary builder aspect of Word Stash lies in the fact that users can create accounts in which they create and save lists of words to study. Users can create as many lists as they like and expand existing lists as they go. Word Stash provides short quizzes based on the words a user puts into a list. In creating the study quizzes, Word Stash uses a spaced repetition algorithm to present users with words based upon how often they answer correctly or incorrectly. To create a list of words users simply need to click "stash" anytime they view a word in the Word Stash dictionary. Users can also share lists and study other users' shared lists

is a free visual, video dictionary. Wordia features a selection of user-submitted and professionally created videos explaining the meaning of a word. The videos focus on the everyday use of words while the text accompanying each video provides the dictionary definition of the word. The video below explains the word literacy.