Khan Academy: 2757 products
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Biology: Endoplasmic reticulum and Golgi bodies
Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus). Their role in protein secretion. Biology Life is beautiful! From a…
VideoFree12 minutes
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Biology: DNA as the "transforming principle"
How Griffith and later Avery, McCarty and MacLeod found strong evidence that DNA is the "transforming principle" that encodes genetic infor…
VideoFree10 minutes
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Chemistry: Reactions in equilibrium
Equilibrium reactions and constants. Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter: its…
VideoFree15 minutes
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Chemistry: Definition of pH
Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice. Chemistry Did you know that everyt…
VideoFree12 minutes
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Chemistry: 2015 AP Chemistry free response 7
Energy necessary to recycle aluminum from aluminum oxide. From 2015 AP Chemistry free response 7. Chemistry Did you know that everything is…
VideoFree6 minutes
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Biology: Light dependent reactions actors
More detailed description of the various molecular actors in the light dependent reactions. Biology Life is beautiful! From atoms to cells,…
VideoFree7 minutes
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Chemistry: Autoionization of water
Autoionization of water into hydronium and hydroxide ions. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoFree11 minutes
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Chemistry: Finding formula for ionic compounds
Finding formula from name of ionic compound, using example of calcium bromide. Chemistry Did you know that everything is made out of chemic…
VideoFree3 minutes
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Cosmology and astronomy: Supernova (supernovae)
Supernova (Supernovae) Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about th…
VideoFree12 minutes
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Organic chemistry: E2 elimination: Stereoselectivity
Stereoselectivity of E2 elimination reactions. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basi…
VideoFree11 minutes
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Chemistry: Visually understanding balancing chemical equations
Relating the balanced chemical equation to the structural formulas of the reactants and products. Chemistry Did you know that everything is…
VideoFree5 minutes
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Chemistry: Change of state example
Specific heat capacity and enthalpy of vaporization example: calculating how much energy it takes to vaporize 1.00 kg of ethanol starting f…
VideoFree8 minutes
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Organic chemistry: Reactions at the benzylic position
Free radical bromination, nucleophilic substitution, oxidation. Organic chemistry Sal and Jay cover topics covered in college organic chemi…
VideoFree10 minutes
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Chemistry: Introduction to redox reactions
Finding the half reactions in a combustion reaction, and identifying what is getting oxidized and reduced. Chemistry Did you know that ever…
VideoFree11 minutes
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Organic chemistry: Identifying functional groups
How to identify functional groups present in organic compounds Organic chemistry Sal and Jay cover topics covered in college organic chemis…
VideoFree9 minutes