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The original Hawker Harrier Jet was designed by the British in the 1960s and utilized a "vectored thrust turbofan engine" that allowed thrust generated by the engines to be pointed downward. The first planes were launched using ramps that curved upward like a ski jump on the flight deck.

"Assessment in game-based learning (GBL) programs can be far superior to your typical weekly multiple-choice test. Games are all about constant assessment. Games do not actively "teach" - they don't say "here is some knowledge for you to remember" - but rather they provide constant challenges and then give you feedback on your decisions, and that is how you learn."

"a physicist has thrown her hat into the ring, arguing that it is the world's first known protractor"

"International Space Station Expedition 16 Flight Engineer Dan Tani discusses and demonstrates Newton's laws. You can mix and mash these video clips with NASA images and your own narration, original video, special effects and transitions. Preview the video and download the clips you want to use in your own project."

"In 1687, Newton published a book with his explanation of how an object, or matter, moves. The book, entitled "Principia," is important to science because in it he explained three laws of motion and the Universal Law of Gravity. Newton's Laws of Motion describe the relationships between motion, matter and force. "

"Get ready to get blown away by our bridges. Most bridges are suspension bridges but there are some arch bridges and truss bridges. The bridges are made with ALL KINDS of materials like popsicle sticks, wire, cardboard, paper mache, pasta, metal, hockey sticks, and wood. Hailey's was the smallest and Janaya's was the biggest. All of our bridges were interesting and amazing. They showed what we knew about strength, decks, approaches, holding a load (weight), reinforcements and all kinds of bridge stuff."

"It depends on what you define as "electricity". Do you mean the flow of "electrons" or the flow of "current"? Because, due to an unfortunate quirk of history, the direction of *current* flow is opposite to the direction of *electron* flow. "

"Four open spans need bridges. You've just been put in charge of deciding which type of bridge is best for each of those four spans. Are you up to the task? Let's find out. First, you'll want to take a good look at each site. Then you'll want to research each of the four kinds of bridges that you can choose from. Only then will you be ready to try your hand at building a bridge-actually four of them! Follow the steps below: "

"Square-wheeled bike on a catenary curve in 3D Studio Max 2009 "

"Music: a Mathematical Offering"