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
Chemistry: Weak acid equilibrium
Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution. Chemistry Did you know that everything is made out of …
VideoFree10 minutes
check_box_outline_blank
Biology: Introduction to evolution and natural selection
Introduction to how groups of organisms evolve and how natural selection can lead to evolution. Biology Life is beautiful! From atoms to ce…
VideoFree18 minutes
check_box_outline_blank
Organic chemistry: Stability of cycloalkanes
How to analyze the stability of cyclopropane, cyclobutane, cyclopentane, and cyclohexane Organic chemistry Sal and Jay cover topics covered…
VideoFree8 minutes
check_box_outline_blank
Organic chemistry: Stabilization of a conjugate base: resonance
How resonance affects the stability of a conjugate base Organic chemistry Sal and Jay cover topics covered in college organic chemistry cou…
VideoFree7 minutes
check_box_outline_blank
Chemistry: 2015 AP Chemistry free response 3d
Calculating the pH at the half-equivalence point for the titration of a weak base with HCl. From 2015 AP Chemistry free response 3d. Chemis…
VideoFree4 minutes
check_box_outline_blank
Cosmology and astronomy: Plates moving due to convection in mantle
Plates Moving Due to Convection in Mantle Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, yo…
VideoFree6 minutes
check_box_outline_blank
Biology: Ecosystem ecology: Links in the chain
Hank discusses ecosystems, trophic structure, and the flow of energy through food webs. Biology Life is beautiful! From atoms to cells, fro…
VideoFree10 minutes
check_box_outline_blank
Biology: Oxidative phosphorylation and the electron transport chain
How oxidation of co-enzymes like NADH can lead to the production of ATP through oxidative phosphorylation. Biology Life is beautiful! From …
VideoFree16 minutes
check_box_outline_blank
Biology: New localities lead to new biodiversity
Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascina…
VideoFree11 minutes
check_box_outline_blank
Biology: Conservation and restoration ecology
Hank discusses different types of biodiversity, as well as how biodiversity can be measured, preserved, and restored. Biology Life is beaut…
VideoFree10 minutes
check_box_outline_blank
Organic chemistry: Elimination vs substitution: secondary substrate
Examining which types of reactions secondary alkyl halides can undergo. Organic chemistry Sal and Jay cover topics covered in college organ…
VideoFree12 minutes
check_box_outline_blank
Chemistry: Calorimetry and enthalpy introduction
Today's episode dives into the HOW of enthalpy. How we calculate it, and how we determine it experimentally...even if our determinations he…
VideoFree11 minutes
check_box_outline_blank
Biology: The scientific method
How the scientific method is used to ask questions and test explanations. Biology Life is beautiful! From atoms to cells, from genes to pro…
VideoFree12 minutes
check_box_outline_blank
Biology: 2015 AP Biology free response 6
Fixing a declining snake population. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems…
VideoFree6 minutes
check_box_outline_blank
Cosmology and astronomy: Agriculture and human population
Thinking about how we get Calories from the land limits human population densities Cosmology and astronomy It's a great, big universe out t…
VideoFree13 minutes