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: 2015 AP Biology free response, 1a-c
Genetic and environmental influences on mouse activity cycles. Biology Life is beautiful! From atoms to cells, from genes to proteins, from…
VideoFree11 minutes
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Biology: Human evolution overview
From the extinction of the dinosaurs to humanity Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations t…
VideoFree12 minutes
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Cosmology and astronomy: Galactic collisions
Collision of the Milky Way Galaxy with Andromeda (forming "Milkomeda") Cosmology and astronomy It's a great, big universe out there. In thi…
VideoFree4 minutes
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Biology: Human population growth
Hank explores human population growth, exponential growth of populations, and R- and K-strategists. Biology Life is beautiful! From atoms t…
VideoFree10 minutes
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Biology: Ecosystems and biomes
Introduction to ecosystems. How land ecosystems are classified into biomes. Biology Life is beautiful! From atoms to cells, from genes to p…
VideoFree8 minutes
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High school biology: Human fertilization and early development
Overview of fertilization and early human development. From conception leading to a zygote to blastocyst, embryo and fetus. High school bio…
VideoFree8
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Biology: Hershey and Chase: DNA is the genetic material
How Alfred Hershey and Martha Chase showed conclusively that DNA is the genetic material. Biology Life is beautiful! From atoms to cells, f…
VideoFree9 minutes
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Biology: Water as a solvent
Water as a solvent. Polar solutes. Hydrophilic and hydrophobic substances. Biology Life is beautiful! From atoms to cells, from genes to pr…
VideoFree9 minutes
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Biology: Phosphorous cycle
Introduction to the phosphorous cycle. How phosphorus is recycled from phosphate to ATP and DNA. Biology Life is beautiful! From atoms to c…
VideoFree6 minutes
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Biology: How biodiversity is distributed globally
How biodiversity is distributed globally. Video by California Academy of Sciences. Biology Life is beautiful! From atoms to cells, from gen…
VideoFree7 minutes
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Biology: Comparing mitosis and meiosis
Comparison of the processes of mitosis and meiosis. Biology Life is beautiful! From atoms to cells, from genes to proteins, from population…
VideoFree6 minutes
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Biology: Chromosomal crossover in meiosis I
How homologous chromosomes exchange fragments in prophase I. Tetrads, chiasmata, and alleles. Biology Life is beautiful! From atoms to cell…
VideoFree12 minutes
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Biology: Heat of vaporization of water and ethanol
Heat of vaporization of water and ethanol. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecos…
VideoFree7 minutes
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High school biology: Three types of muscle
Understanding the structure of a muscle cell. High school biology The musculoskeletal system Topic: Science Learn about all the sciences, f…
VideoFree11 minutes
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Cosmology and astronomy: Stellar parallax
Another version of the stellar parallax introduction Cosmology and astronomy It's a great, big universe out there. In this section of Khan …
VideoFree9 minutes