课前三分钟如果做些课前准备，往往会对一节课的效果产生很好的影响。一、整理仪表。到了课堂上如果对自己的仪表不放心，以致去摸头发，理刘海，摸领子，擦眼镜，会影响上课情绪和高度集中的思维，还会给学生留下一个不够严肃的形象。这就需要课前整理仪表。二、整理情绪。要 If you do some preparatory class three minutes before class, it will often have a very good effect on the result of a class. First, organize the instrument. To the classroom if you do not trust their own instruments, so to touch the hair, bangs, collar, rub glasses, will affect the class mood and highly concentrated thinking, but also to give students leave a less serious image. This requires finishing the instrument before class. Second, organize emotions. want