Experts say his books helped change the way American children learned to read.

VOA: special.2010.05.02

and had still not learned almost anything. She had one of those teach-yourself-piano books,

但并没有学会。她有一本自学钢琴的书，

和钢琴老师 - SpeakingMax英语口语达人

and had still not learned almost anything. She had one of those teach-yourself-piano books,

但并没有学会。她有一本自学钢琴的书，

和钢琴老师 - SpeakingMax英语口语达人