.whiteboard设计。九年级化学主题“材料组成之谜”的微观概念，如分子、原子等，肉眼是看不到的，几乎没有可感知的材料。学生没有感性的知识，非常抽象。他们被教给老师和学生。两者都带来了一定的困难。使用白板可以展示非常抽象的概念、微观的粒子及其运动状态的“物化”，充分激发学生的学习兴趣和求知欲，例如教学中原子的结构，原子外电子的分层排列。根据最外层电子运动定律和最外层电子运动定律，可以得出这样的结论:最外层电子的化学性质决定了元素。以前，教师可以自由解释。学生们用他们的想象力来教和学，或者他们展示一些挂图。解释一下。借助于白板，可以模拟原子核外电子的运动状态，特别是最外层电子的运动状态。 Another example is the dynamics of teaching chemical changes, simulating how water molecules split into hydrogen and oxygen atoms when water is energized, and how hydrogen and oxygen atoms combine to form a dynamic process of hydrogen and oxygen molecules; The microscopic essence of formation, etc., color animation not only simulates the process and conditions of molecular motion, but also attracts the attention of students, and makes rational inferences from the perception of images. If a certain sound and light effect is added, the microscopic particles become "entities", the abstract content is interpreted by the image, giving the students a real experience. The success breaks through the difficulties, grasps the key points, and is beneficial to the students' knowledge. Acceptance, improve students' understanding, teachers?? lectures,