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 …
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
Biology: Specific heat of water
Specific heat of water. A calorie as the specific heat of water. How water moderates temperature. Biology Life is beautiful! From atoms to …
VideoFree11 minutes
check_box_outline_blank
Biology: Concentration gradients
A concentration gradient occurs when the concentration of particles is higher in one area than another. In passive transport, particles wil…
VideoFree3 minutes
check_box_outline_blank
Organic chemistry: E2 E1 Sn2 Sn1 reactions example 3
E2 E1 Sn2 Sn1 reactions: Example 3 Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understand…
VideoFree13 minutes
check_box_outline_blank
Biology: Worked example: Punnett squares
Learn how to use Punnett squares to calculate probabilities of different phenotypes. Includes worked examples of dihybrid crosses. independ…
VideoFree25 minutes
check_box_outline_blank
Biology: Discussions of conditions for Hardy-Weinberg
An overview of what happens when the conditions for Hardy-Weinberg equilibrium are not fulfilled. Biology Life is beautiful! From atoms to …
VideoFree7 minutes