教师在数学教学中应注重让学生通过观察和操作认识长方形、正方形的一些基本特征,体会长方形和正方形的联系和区别,侧重让孩子经历提出猜想、验证猜想、总结规律的过程,更多地学习量一量、折一折、比一比等数学技能,让学生自主研究填写数学研究单,为以后的自主学习提供宝贵的实战经验. Teachers should pay attention to letting students understand some basic characteristics of rectangle and square through observation and operation, understand the connection and difference between rectangle and square, emphasize that children should learn more from the process of making conjecture, verifying conjecture, summarizing the law The amount of a volume, a fold, a ratio of math skills, so that students fill in the independent study of mathematics, for the future of self-learning to provide valuable practical experience.