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: Oxidation and reduction in cellular respiration
Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction. Biology Life…
VideoFree17 minutes
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Chemistry: Metallic nature
Properties of metals and how we can explain their properties using electron "sea" model. Chemistry Did you know that everything is made out…
VideoFree9 minutes
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Organic chemistry: Sn1 carbocation rearrangement (advanced)
Example reaction showing Sn1 mechanism where substrate with six membered ring forms five membered ring product via alkyl shift. Organic che…
VideoFree7 minutes
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Chemistry: Introduction to "Meet a chemistry professional"
Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactiv…
VideoFree2 minutes
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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