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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High school biology: Introduction to vitamins and minerals
Overview of common vitamins and minerals that are important to human health High school biology Biological macromolecules There's an old sa…
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High school biology: Data to justify experimental claims examples
Example questions analyzing data to justify claims in experiments. High school biology Biology and the scientific method How do biologists …
VideoFree5
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Biology: Mitosis
Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase. Biology Life is…
VideoFree12 minutes
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Organic chemistry: Spin-spin splitting (coupling)
How peaks in a proton NMR can get split into multiplets due to coupling with neighboring protons. Organic chemistry Sal and Jay cover topic…
VideoFree12 minutes
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High school biology: Homeostasis
Ever wondered why your temperature stays at 98.6 degrees? Learn about homeostasis and how your body maintains a stable temperature. High sc…
VideoFree4
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Biology: Photorespiration
The Calvin cycle and a competing pathway called photorespiration (also initiated by Rubisco). Biology Life is beautiful! From atoms to cell…
VideoFree11 minutes
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Organic chemistry: Preparation of alcohols using LiAlH4
How to prepare a primary or secondary alcohol from an aldehyde, ketone, carboxylic acid, or ester using lithium aluminum hydride. Organic c…
VideoFree11 minutes
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Biology: The excretory system: From your heart to the toilet
Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee. Biology Life is beautiful! From at…
VideoFree12 minutes
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Chemistry: Lead storage battery
Balancing the redox reaction (in acid) that occurs in a lead storage battery. Chemistry Did you know that everything is made out of chemica…
VideoFree9 minutes
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Organic chemistry: sp3 hybridized orbitals and sigma bonds
sp3 Hybridized Orbitals and Sigma Bonds Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic under…
VideoFree16 minutes
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Biology: Cell size
Thinking about the limiting factors of cell size. Focus on volume to surface area ratio. Biology Life is beautiful! From atoms to cells, fr…
VideoFree9 minutes
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Biology: Hypotonic, isotonic, and hypertonic solutions (tonicity)
Hypotonic, isotonic and hypertonic solutions (tonicity). Seeing the effect of various types of solution on the direction of osmosis. Biolog…
VideoFree7 minutes
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Chemistry: Introduction to buffers
Introduction to buffer systems, which regulate pH in blood. Chemistry Did you know that everything is made out of chemicals? Chemistry is t…
VideoFree6 minutes
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Cosmology and astronomy: Energy inputs for tilling a hectare of land
Thinking about energy consumption for tilling land Cosmology and astronomy It's a great, big universe out there. In this section of Khan Ac…
VideoFree14 minutes
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High school biology: Skeletal structure and function
High school biology The musculoskeletal system Topic: Science Learn about all the sciences, from physics, chemistry and biology, to cosmolo…
VideoFree7 minutes