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Jump on Twitter to find an amazing collection of scientists who are busy posting links as well as their own thoughts on a wide range of topics.

Hands-on middle school science activities.

Hands-On Science activites for middle schoolers.

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NASA astronaut Don Pettit recently decided to take a little of his off-duty time to demonstrate his "microgravity yo-yo skills.

Team members at NASA's Jet Propulsion Laboratory share the challenges of the Curiosity Mars rover's final minutes to landing on the surface of Mars.

SMILE is collecting the best acience and math educational materials on the web and creating learning activities, tools, and services - all designed especially for those who teach school-aged kids in non-classroom settings.

Fun videos on math, science, art and technology topics.

A fabulous sliding scale showing the smallest and largest things in the universe.

A virtual experiment on how insulation works.

The deepest depths of space, out beyond our atmosphere, our Solar System, and even our galaxy, hold the richness of the great Universe beyond. Stretching for billions of light years in every direction, there are structures large and small, dense and sparse, everywhere we've ever dared to look.

The art of pitching a baseball requires great skill and dexterity to master. A great pitcher is one who understands the engineering of the baseball itself and the aerodynamic principles at work while the ball is in flight.

The evolution of the roller coaster has made them unbelievably fast and monstrously huge. The best is yet to come as technological advances continually raise the bar for speed, size, and most importantly - safety.

Students learn the science of sports with the activities in this educator guide. The activities are applications of Newton's Laws of Motion.

Students often confuse the terms "mass" and "weight." Each activity in this series demonstrates the difference between mass and weight by comparing students' results with the results of astronauts aboard the space station.

Mix hot science with your cool ideas.

Watch and share "A Day Made of Glass 2," Corning's expanded vision for the future of glass technologies. This video continues the story of how highly engineered glass, with companion technologies, will help shape our world.

Resourcesforhistoryteachers is organized by teachers and students from the History and Political Science Teacher Education Program in the School of Education at the University of Massachusetts Amherst. It features primary source, multicultural, and multimedia resources for teaching history in K-12 schools.

"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."