激发学生的学习兴趣,这是教学中一种很讲究的艺术。兴趣是学生渴望求知的内部动力,是发展学生智力的关键因素,是开发学生大脑潜能的有效措施,是提高学生学习成绩的重要诱因,是课堂教学改 Stimulate students interest in learning, this is a very teaching of art. Interest is the internal motivation of students ’longing for knowledge. It is a key factor to develop students’ intelligence and an effective measure to develop students ’brain potential. It is an important inducement to improve students’ academic performance.