我长期在教学第一线,有更多的机会听青年教师上数学课,追求课堂“多而全”是其通病之一。一节课有限的四十五分钟,要想把什么问题都说透,怎么能办得到呢?毛主席讲过这么一个军事原则,叫做“集中优势兵力打歼灭战。”他反对“十个指头按跳蚤”,如此分 I have long been at the frontline of teaching and have more opportunities to listen to young teachers to attend math classes. The pursuit of a “multiple and comprehensive” class is one of its common ailments. Forty-five minutes of a limited lesson, if you want to speak clearly about what issues, how can you manage it? Chairman Mao has said that such a military principle is called “concentrating superior forces to fight annihilation.” He opposed “ten finger presses. Fleas, so divided