在当前的高考模式下,化学学科的课堂更要注重高效,使要解决的问题都在课堂中解决.那么,高效课堂需要注意什么?而做好二次备课就能实现目的.如何在二次备课中突破重难点以及创设好合适的情境是至关重要的.二次备课的重点是研究知识点如何攻破,情境如何创设.一、确定重点、难点及处理方法观摩他人课堂和教学录像的关键是找准教学的重点和难点以及他人是如何处理教学的重点和难点.备课者结合 In the current college entrance examination mode, chemistry class should pay more attention to the high efficiency of the class, so that problems to be solved in the classroom.Then, efficient classroom need to pay attention to? And do a good job in secondary lesson preparation can be achieved. It is very important to break through the heavy and difficult points and create the right situation in the lesson preparation.The focus of the second lesson preparation is to study how to break through the knowledge points and how to set up the situation.Key Points, Difficulties and Solutions The key to observe other people’s classroom and teaching videos Is to identify the key and difficult teaching and others is how to deal with the teaching of the key and difficult.