课改至今,小学数学课堂教学的低效问题依然困扰着许多一线教师。如何提高课堂教学的有效性是摆在数学教师面前的一大命题。本人认为有效备课是提高课堂教学有效性的前提和基础。诚如名家所言:“没有备课时的全面考虑与周密设计,哪有课堂上的有效引导与动态生成,没有上课前的胸有成竹,哪有课堂中的游刃有余。”如何做到有效备课?这是值得我们思考和研究的问题。一、脉络备课—构建课堂大框架新课程理念下的课堂教学是一种开放、动态、多元化的对话与交流,这就意味着教学将会有更多的“不确定性”。但是受传统教学的影响,许多教师在备课时不 Curriculum reform so far, the inefficient primary school mathematics classroom teaching is still bothering many front-line teachers. How to improve the effectiveness of classroom teaching is a big proposition facing mathematics teachers. I think that effective lesson preparation is to improve the effectiveness of classroom teaching of the premise and foundation. As the famous saying goes: “There is no comprehensive consideration when preparing lessons and careful design, which can be effectively guided and dynamically generated in the classroom, there is no pre-school brains, which classrooms ease. ” How to do an effective lesson preparation? This is a question that deserves our consideration and research. First, context preparation lesson - to build the framework of the classroom The new curriculum concept of classroom teaching is an open, dynamic and diverse dialogue and exchange, which means that teaching will have more “uncertainty ”. But by the traditional teaching, many teachers do not prepare lessons