发展学生智力和培养学生能力,是生物课教学的主要目的之一。我在“河蚌”一节的教学过程中注意理论联系实际,利用实物、实验进行直观教学,充分调动学生学习的积极性、主动性,发展学生智力,培养学生能力,取得较好的效果。 (一)导入新课河蚌是常见的软体动物,所以学生对这种动物有两种看法:第一,认为经常可见,没有特殊的地方;第二,认为河蚌的经济价值不高。因此觉得河蚌没有什么好学习的。考虑到这些思想,我进行了有针对性的教学。本节课一开始,就让学生观看珍珠。我准备了十几颗珍珠,先用镊子夹起一颗较大的让学生观看,然后每个学习大组发给一个培养皿,内装有2-3颗珍珠,轮流观看。紧接着我简要地介绍了珍珠的经济价值。珍珠可作装饰品,也是制珍珠霜的原料,我国已 Developing students ’intelligence and cultivating students’ abilities are one of the main purposes of biology teaching. In the course of teaching “River Clam”, I pay attention to integrating theory with practice, making use of in-kind and experiment teaching, fully mobilizing the enthusiasm and initiative of students, developing students ’intelligence, cultivating students’ ability and achieving better results. (A) into the new class River mussel is a common mollusk, so students have two views on this animal: first, that is often visible, there is no special place; second, that the mussel economic value is not high. So I feel nothing mussels mussel learning. With these thoughts in mind, I conducted targeted teaching. Beginning of this lesson, let students watch pearl. I prepared a dozen pearl, the first with a pair of tweezers to pick up a larger for students to watch, and then sent to each study group a Petri dish, built with 2-3 pearls, take turns watching. Then I briefly introduced the economic value of pearl. Pearl can be used as decorations, but also the system of pearl cream raw materials, China has