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: Control of the GI tract
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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Chemistry: Balancing chemical equations
How to balance a chemical reaction by making sure you have the same number of atoms of each element on both sides. Chemistry Did you know t…
VideoFree5 minutes
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Health and medicine: Pulmonary hypertension diagnosis Swan Ganz catheterization
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree3 minutes
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Organic chemistry: Naming simple alkanes
Naming simple linear and cyclic alkanes Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic under…
VideoFree9 minutes
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Chemistry: Acid base titration example
Using acid-base titration to find mass of oxalic acid, a weak acid. Chemistry Did you know that everything is made out of chemicals? Chemis…
VideoFree13 minutes
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Chemistry: Oxidation state trends in periodic table
Trends in common oxidation states for main group elements. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoFree9 minutes
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Biology: The water cycle
How the sun's energy drives the water cycle on Earth. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populati…
VideoFree8 minutes
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Organic chemistry: Friedel-Crafts alkylation
The mechanism of alkylation. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of…
VideoFree14 minutes
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Chemistry: VSEPR for 2 electron clouds
Definition of VSEPR and examples of molecules with two electron clouds. Chemistry Did you know that everything is made out of chemicals? Ch…
VideoFree8 minutes
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Chemistry: Nickel-cadmium battery
Balancing the redox reaction (in base) that occurs in a nickel-cadmium battery. Chemistry Did you know that everything is made out of chemi…
VideoFree11 minutes
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Health and medicine: Teeth
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree8 minutes
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Health and medicine: Alveolar gas equation - part 2
Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and wor…
VideoFree7 minutes
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Chemistry: Titration introduction
Introduction to acid-base titrations using example of titrating 20.0 mL of HCl of unknown concentration with 0.100 M NaOH. Covers indicator…
VideoFree9 minutes
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Health and medicine: Ritual of the bedside exam
Dr. Abraham Verghese explains the ritual of the bedside exam Health and medicine The medical world can be a confusing place. Patients, thei…
VideoFree9 minutes
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Organic chemistry: Aromatic heterocycles II
The aromaticity of pyrrole, imidazole, and thiophene. Organic chemistry Sal and Jay cover topics covered in college organic chemistry cours…
VideoFree12 minutes