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: Diffusion - Introduction
Learn about how particles move from an area of greater concentration to an area of lesser concentration through the process of diffusion. B…
VideoFree6 minutes
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Organic chemistry: Newman projection practice 2
How to determine the most and least stable conformations using Newman projections Organic chemistry Sal and Jay cover topics covered in col…
VideoFree11 minutes
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Cosmology and astronomy: Big bang introduction
Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about the brain-bending vastnes…
VideoFree11 minutes
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Organic chemistry: Naming benzene derivatives
How to name benzene derivatives, with examples. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Bas…
VideoFree11 minutes
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Biology: Professional antigen presenting cells (APC) and MHC II complexes
Professional antigen presenting cells (APCs) are immune cells that specialize in presenting an antigen to a T-cell. The main types of profe…
VideoFree12 minutes
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Organic chemistry: Naming alkanes with alkyl groups
Naming linear alkanes with branching starting from the structure, and drawing the structures based on the name. Organic chemistry Sal and J…
VideoFree11 minutes
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Chemistry: Forms of the Arrhenius equation
How to write different forms of the Arrhenius equation. Using the Arrhenius equation to look at how changing temperature and activation ene…
VideoFree7 minutes
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Organic chemistry: Oxidation of alcohols I: Mechanism and oxidation states
Oxidation of primary alcohols to aldehydes (and then carboxylic acids); oxidation of secondary alcohols to ketones. Organic chemistry Sal a…
VideoFree13 minutes
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High school biology: Ligaments, tendons, and joints
High school biology The musculoskeletal system Topic: Science Learn about all the sciences, from physics, chemistry and biology, to cosmolo…
VideoFree3 minutes
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Chemistry: Complete ionic and net ionic equations
The difference between molecular equations, complete ionic equations and net ionic equations. How to identify spectator ions. Chemistry Did…
VideoFree6
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Organic chemistry: Keto-enol tautomerization (by Jay)
Mechanisms for acid and base catalyzed keto-enol tautomerization. Organic chemistry Sal and Jay cover topics covered in college organic che…
VideoFree11 minutes
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Organic chemistry: Formation of imines and enamines
How aldehydes and ketones react with primary and secondary amines to for imines and enamines. Organic chemistry Sal and Jay cover topics co…
VideoFree14 minutes
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Biology: Antiparallel structure of DNA strands
DNA is composed of two strands of nucleotides held together by hydrogen bonding. The strands each run from 5' to 3' and run in antiparallel…
VideoFree10 minutes
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Organic chemistry: Ether nomenclature
Rules for naming ethers. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of bas…
VideoFree11 minutes
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Biology: Anatomy of a neuron
Neurons (or nerve cells) are specialized cells that transmit and receive electrical signals in the body. Neurons are composed of three main…
VideoFree6 minutes