全册教学内容综述一、知识内容本册教科书共有十四课，从知识内容上学，可以分为四个方面。（一）岩石在低年级学习了粘土、石头等知识的基础上，指导学生认识岩石的基本特征。包括第五二课。（二）植物在低年级学习了各种各样的花和各种各样的种子等知识的基础上，指导学生认 Whole book teaching content summary First, the content of knowledge This book textbook a total of fourteen lessons, from the knowledge content to school, can be divided into four aspects. (1) The rock learns clay, stone and other knowledge in the lower grades, guiding the students to recognize the basic characteristics of the rock. Including the fifth lesson. (2) On the basis of learning a variety of flowers and a variety of seeds and other knowledge from the lower grades, the plant guides students to recognize