俗话说：“良好的开端是成功的一半。”一节课的开始是学生学习知识的关键。好的开始可以使学生精力集中，充分激发学生学习的热情和求知欲望，促使学生深入思考，学好知识。那么，如何更好地导入新课呢？我认为要坚持正确的原则和选择较好的方法。一、化学课导入的原则1．新课 As the saying goes: “A good beginning is half of success.” The beginning of a class is the key to students’ learning. A good start can concentrate students’ energy, fully stimulate students’ enthusiasm for learning and their desire to learn, and encourage students to think deeply and learn knowledge well. So, how to better introduce new lessons? I think we must stick to the correct principles and choose better methods. First, the principle of the introduction of chemistry class 1. New class