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: Photosynthesis
Overview of photosynthesis. What photosynthesis accomplishes, why it's important, and how the light-dependent and light-independent reactio…
VideoFree14 minutes
check_box_outline_blank
Electrical engineering: Sine and cosine from rotating vector
One way to generate sine and cosine is to track the motion of a rotating vector. Animated. Electrical engineering Learn about electricity, …
VideoFree4 minutes
check_box_outline_blank
High school biology: Asexual and sexual reproduction
Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction. High school biology Types of reproduction Learn a…
VideoFree9
check_box_outline_blank
Electrical engineering: Spout motor mount
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree4 minutes
check_box_outline_blank
Electrical engineering: Connect the LEDs to an on/off switch
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree5 minutes
check_box_outline_blank
Chemistry: Second-order reaction example
Example of using integrated rate law to solve for concentration, and calculating the half life for a second-order reaction. Chemistry Did y…
VideoFree8 minutes
check_box_outline_blank
Biology: Biodiversity and natural selection
Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms. Vi…
VideoFree9 minutes
check_box_outline_blank
Biology: B lymphocytes (B cells)
Overview of B cells (B lymphocytes) and how they are activated and produce antibodies. Biology Life is beautiful! From atoms to cells, from…
VideoFree14 minutes
check_box_outline_blank
Biology: Tertiary structure of proteins
How side chain interactions can impact the tertiary structure of proteins. Biology Life is beautiful! From atoms to cells, from genes to pr…
VideoFree7 minutes
check_box_outline_blank
High school biology: Introduction to the cell
Introduction to the cell High school biology Basic cell structures We'll learn about the complex and beautiful structures you can find insi…
VideoFree6
check_box_outline_blank
Biology: Cytotoxic T cells and MHC I complexes
How damaged cells present antigens from inside the cell on MHC I and are recognized by cytotoxic T cells. Biology Life is beautiful! From a…
VideoFree9 minutes
check_box_outline_blank
Electrical engineering: Sine and cosine come from circles
Sine and cosine can be generated by projecting the tip of a vector onto the y-axis and x-axis as the vector rotates about the origin. Elect…
VideoFree5 minutes
check_box_outline_blank
Chemistry: Real vs ideal gas behavior
Ideal gas law assumptions, and when they break down. What happens to pressure and volume at low T and high P. Chemistry Did you know that e…
VideoFree11 minutes
check_box_outline_blank
Organic chemistry: Optical activity calculations
How to calculate specific rotation and % enantiomeric excess Organic chemistry Sal and Jay cover topics covered in college organic chemistr…
VideoFree8 minutes
check_box_outline_blank
Biology: CAM plants
How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day. Biology Life is beautiful! Fro…
VideoFree9 minutes