KHAN ACADEMY

The website features thousands of educational resources, including a personalized learning dashboard, over 100,000 exercise problems, and over 4000 micro lectures^[4] via video tutorials stored on YouTube teaching mathematics, history, healthcare, medicine, finance, physics, general chemistry, biology, astronomy, economics, cosmology, organic chemistry, American civics, art history, macroeconomics, microeconomics, and computer science.All resources are available for free to anyone around the world. Khan Academy reaches about 10,000,000 students per month and has delivered over 300,000,000 lessons

                                          

Visit: https://www.khanacademy.org/