Khan Academy Education Platform

Khan Academy is a free non-profit educational organization providing personalized learning through instructional videos, practice exercises, and a learning dashboard. Founded in 2008 by Salman (Sal) Khan (a former hedge fund analyst with three degrees from MIT and an MBA from Harvard), it started when Sal began tutoring his cousin Nadia in mathematics remotely. Headquartered in Mountain View, California, it has received funding from the Bill and Melinda Gates Foundation, Google, and Ann and John Doerr Foundation. Serves over 140 million registered users in over 50 languages. Key features: courses spanning mathematics (from early math through multivariable calculus, linear algebra, differential equations), science (physics, chemistry, biology, astronomy), computing (programming, computer science, algorithms), arts and humanities (history, art history, economics, grammar), and test preparation (SAT, LSAT, MCAT). Instructional videos: over 10,000 videos featuring Sal Khan's signature teaching style. Average 10-minute length. Practice exercises: interactive problem sets with immediate feedback, step-by-step hints, and adaptive difficulty. Mastery system: students must demonstrate mastery (consecutive correct answers) before progressing. Personalized dashboard: tracks progress, recommends next skills, displays mastery progress. Khanmigo: AI-powered tutor built on GPT-4, providing Socratic-method tutoring and writing feedback. Teacher tools: assignments, progress tracking, and class management for educators. Available in over 50 languages. Free for all users. JavaScript/Python. Non-profit.