The diversity present in every aspect of American life is an inevitable consequence of its multicultural society.Schools across the country are a reflection of what is,and always has been,an ever changing demographic constitution.Classroom teachers,especially teachers who have no teaching experience in the country,face a stiff challenge of teaching all students,regardless of their backgrounds.As a Chinese guest teacher in the States,I learned that the'growing-up'of a teacher requires positive changes in three areas: knowledge,attitudes and skills.Support from administrators is also vital in the'growing-up'process.