Bill Weber

1. Общност
2. Positive Stories and Testimonials
3. Sal, an inspiration

I also love Sal's voice and his gentle, patient and non-judgmental way of explaining.  Unlike some of the teachers that I had in school, he has never once yelled at me, laughed at me or mocked me i...

1. Общност
2. Positive Stories and Testimonials
3. Thank you so much Khan Academy!

I agree !!  Thank you !!  I am re-studying math from arithmetic through Calculus to prove to myself that the F and the D that I received in mandatory college freshman Calculus were the result of 13...