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Brainwaves Video Anthology
Joseph Renzulli - What is Giftedness
Joseph Renzulli is an American educational psychologist. He developed the three-ring model of giftedness, which promoted a broadened conception of giftedness. He also developed the "Schoolwide Enrichment Model" for developing...
Khan Academy
Proof: Hyperbola Foci, Conic Sections, Algebra II
In a video that is quite involved, algebraically, Sal proves that the distance of the foci from the center of a hyperbola is the square root of a2+b2. Since the algebra shown here is challenging, this video might be appropriate as an...