兴趣是学生学习动机中最活跃、最现实的心理因素。如果教师能点燃学生心中的兴趣之火，就能促使他们主动学习，从而让智力得以开发，能力得到培养，教学质量得到提高。 　　课初创设问题情境，激发认知兴趣。一堂课开始时，不少学生虽进了课堂，但心里还想着课间玩的游戏，精 Interest is the most active and realistic psychological factor in students’ motivation to learn. If teachers can ignite the fire of interest in students’ hearts, they can motivate them to learn actively so that intelligence can be developed, their abilities developed and their teaching quality improved. Create a problem situation in the beginning of class to stimulate cognitive interest. At the beginning of a class, although many students into the classroom, but still thinking of playing in the middle of the game, fine