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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Health and medicine: What is TB?
Find out the basics of TB, where it comes from and where it goes. Rishi is a pediatric infectious disease physician and works at Khan Acade…
VideoFree12 minutes
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Health and medicine: Diabetes in pregnancy
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree8 minutes
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Organic chemistry: Chiral examples 2
Chiral examples 2 Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of basic high…
VideoFree10 minutes
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Chemistry: Arrhenius equation
Definition of rate constant k, the pre-exponential factor A, and activation energy. How the exponential part of the Arrhenius equation depe…
VideoFree9 minutes
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Organic chemistry: Organic oxidation-reduction reactions
How to determine if a starting compound is oxidized, reduced, or neither Organic chemistry Sal and Jay cover topics covered in college orga…
VideoFree14 minutes
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Health and medicine: Valvular heart disease diagnosis and treatment
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree10 minutes
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Health and medicine: Arteriolosclerosis - part 2
See how hyperplastic arteriolosclerosis (Protein in the arterial wall) makes it difficult for blood to go through blood vessels. Rishi is a…
VideoFree5 minutes
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Chemistry: First and second ionization energy
Comparing first and second ionization energy of Li using nuclear charge, shielding, and distance of electrons from nucleus Chemistry Did yo…
VideoFree8 minutes
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Organic chemistry: Sn2 mechanism: stereospecificity
How nucleophilic attack in Sn2 reaction results in inversion of configuration at carbon with leaving group. Organic chemistry Sal and Jay c…
VideoFree10 minutes
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Chemistry: Atomic and ionic radii
Explaining group and period trends in atomic and ionic radii. Chemistry Did you know that everything is made out of chemicals? Chemistry is…
VideoFree11 minutes
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Health and medicine: What is asthma?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree10 minutes
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Organic chemistry: E2 reactions
E2 Elimination Reactions Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of bas…
VideoFree9 minutes
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Biology: Liquid water denser than solid water (ice)
Water less dense as ice. Why lakes don't freeze solid. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populat…
VideoFree6 minutes
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Biology: Endomembrane system
An overview of the membrane-bound structures that form the endomembrane system in eukaryotic cells. Biology Life is beautiful! From atoms t…
VideoFree6 minutes
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Chemistry: Introduction to light
Light and the electromagnetic radiation spectrum. Wave and particle-like behavior, and how to calculate the wavelength or frequency of a li…
VideoFree10 minutes