Oppia is a tool for creating interactive online activities that enable students to learn by doing. Its creators believe that this is often a more effective and efficient way of learning than either watching videos or reading texts, since it allows the student to engage more deeply with the activity in a way that videos or books often do not
Sciences, sciences humaines, sciences sociales, langues...
"The mistake of scientism is to elevate scientific knowledge and data crunching to a level of certainty and competence they most definitely do not have, while at the same time dismissing every other approach as obsolete nonsense."
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The Cubli is a 15 × 15 × 15 cm cube that can jump up and balance on its corner. Reaction wheels mounted on three faces of the cube rotate at high angular vel...
A higher res, faster paced video demonstration of the RotaryMek-12X Rubber Band Gun.
Clayton Boyer demonstrates a variety of square, oval, pentagonal, organic and other unbelievably-shaped gears--and they really work! Woodworking plans now a...
Ferrofluid demonstration, electromagnets power controlled by sound... neat stuff