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: Diagnosing cerebral palsy
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree10 minutes
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Health and medicine: Truncus arteriosus
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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Health and medicine: Psychoactive drugs: Hallucinogens
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree4 minutes
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Health and medicine: Why doesn't the heart rip?
Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the "wall stress" in the left ventricle. …
VideoFree10 minutes
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Health and medicine: Electrocardioversion
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree7 minutes
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Health and medicine: Arteries vs. veins - what's the difference?
Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Health and medicine The …
VideoFree8 minutes
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Health and medicine: Mantoux test (aka. PPD or TST)
Learn how the Mantoux test is done and how it works. Rishi is a pediatric infectious disease physician and works at Khan Academy. These vid…
VideoFree9 minutes
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Chemistry: Weak acid equilibrium
Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution. Chemistry Did you know that everything is made out of …
VideoFree10 minutes
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Biology: Introduction to evolution and natural selection
Introduction to how groups of organisms evolve and how natural selection can lead to evolution. Biology Life is beautiful! From atoms to ce…
VideoFree18 minutes
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Electrical engineering: Attach the LED eyes
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree9 minutes
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Organic chemistry: Stability of cycloalkanes
How to analyze the stability of cyclopropane, cyclobutane, cyclopentane, and cyclohexane Organic chemistry Sal and Jay cover topics covered…
VideoFree8 minutes
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Organic chemistry: Stabilization of a conjugate base: resonance
How resonance affects the stability of a conjugate base Organic chemistry Sal and Jay cover topics covered in college organic chemistry cou…
VideoFree7 minutes
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Chemistry: 2015 AP Chemistry free response 3d
Calculating the pH at the half-equivalence point for the titration of a weak base with HCl. From 2015 AP Chemistry free response 3d. Chemis…
VideoFree4 minutes
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Cosmology and astronomy: Plates moving due to convection in mantle
Plates Moving Due to Convection in Mantle Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, yo…
VideoFree6 minutes
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Electrical engineering: Negative frequency
The concept of negative frequency is perplexing, but it makes sense when you think about rotating complex exponentials Electrical engineeri…
VideoFree7 minutes