Sal Khan:
On starting Khan academy: started videos to help out cousin. Found the videos were helpful so why not make it accessible for others--Free quality education for everyone everywhere.
Now Khan academy has 10 more people than Harvard has graduates since 1636.
500 Million plus lessons
6 Million plus unique users
Interactive. Videos for clarification. Instead of fixed time, hold fixed high level of proficiency, let them have more time.
Students can help each other. Differentiated learning.
Human being has the highest value when they are working collaboratively (interactively), highest value when they are mentoring.
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