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: C4 photosynthesis
C4 photosynthesis: how some plants avoid photorespiration. Biology Life is beautiful! From atoms to cells, from genes to proteins, from pop…
VideoFree17 minutes
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Biology: Overview of the functions of the cerebral cortex
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree6 minutes
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Health and medicine: Cellular structure of bone
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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High school biology: Introduction to proteins and amino acids
Introduction to proteins as polymers of amino acids (monomers). High school biology Biological macromolecules There's an old saying, "You a…
VideoFree6
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Cosmology and astronomy: White and black dwarfs
White and Black Dwarfs Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about th…
VideoFree13 minutes
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Organic chemistry: E2 E1 Sn2 Sn1 reactions example 2
E2 E1 Sn2 Sn1 Reactions Example 2 Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understandi…
VideoFree3 minutes
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Biology: Old & Odd: Archaea, Bacteria & Protists
Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains o…
VideoFree12 minutes
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Organic chemistry: E1 elimination: regioselectivity
Regioselectivity and stereoselectivity of E1 elimination reactions. Organic chemistry Sal and Jay cover topics covered in college organic c…
VideoFree7 minutes
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Biology: Functional groups
Hydroxyl, sulfhydryl, carbonyl, carboxyl, amino and phosphate groups. Alcohols and thiols. Biology Life is beautiful! From atoms to cells, …
VideoFree10 minutes
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Health and medicine: Membrane potentials - part 1
Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentrat…
VideoFree8 minutes
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Health and medicine: Why do some people but not others develop substance use problems?
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree4 minutes
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Chemistry: Boiling point elevation and freezing point depression
Boiling point elevation is the raising of a solvent's boiling point due to the addition of a solute. Similarly, freezing point depression i…
VideoFree14 minutes
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Chemistry: Another mass composition problem
Another exercise converting a mass composition to an empirical formula. Chemistry Did you know that everything is made out of chemicals? Ch…
VideoFree7 minutes
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Organic chemistry: Acid-base definitions
Bronsted-Lowry and Arrhenius definitions of acids and bases. Organic chemistry Sal and Jay cover topics covered in college organic chemistr…
VideoFree9 minutes
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Cosmology and astronomy: Cosmic background radiation 2
Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation Cosmology and astronomy It's a great, big universe out there. I…
VideoFree10 minutes