Is Korean really that much more efficient than English, or is that word a label?
The instructors started to teach her after 949 tries - 949 tries, of watching this poor woman fail! - then she did learn, and got it on the 11th try after that. Teaching her was frustrating to them, I think mainly because they weren't really teaching her about driving, but a subset of civil administration and technology concepts, such as "regulations" and "emergency light".
The tragedy is that she could not afford "Middle school", despite dreaming of it so painfully that taking the driving test daily became a joyous wish fulfillment of attending school... an attitude of which the stereotypical student is too invisibly wealthy to properly conceive.