The America author jack london was once a pupil at the ColeGrammar school in oakland,California.
Each morning the class sang a song. when the teacher noticed that jack wouldn't sing,she sent himto the principal. He returned to class with a note. it said that he could be excused from singing, but he would have to wrile an easy every morning.(The main idea is "jack london's writing skill may be traced to his punishment in grammar school.")