Her son felt that he already knew what the teacher was teaching, and so he read his own books.But the teacher couldn't stand students who didn 't listen in class and told Chang that his son "had a short attention span" "I didn't agree that it was just a matter of his having a short attention span, and it made me curious," she recalls.
兒子覺得老師講的課他已經會了，於是看自己的書，老師無法忍受不聽課的學生，對媽媽說他「不夠專心」。