一、让学生动手准备实验和观察的材料如学习植物的根、茎、叶、花、果实、种子等，让学生自己去采集。学习磁铁、电磁铁、小电珠等也让学生准备一些磁铁、导线、铁钉、电池等。学习土壤的成分，就让学生去挖一点土壤回来。总之，自然课上所需要的材料，学生能准备的，教师一定 First, let the students start experimenting and observing the materials such as studying the roots, stems, leaves, flowers, fruits, seeds of plants, etc., to let the students collect them. Learning magnets, electromagnets, small beads, etc. also allow students to prepare some magnets, wires, nails, batteries and so on. Learn the composition of the soil, let the students dig a little soil back. In short, the materials needed in nature class, students can prepare, teachers must