苏格拉底说:“美是功用,美是效益”。这说明美可以提高效率,笔者用美提高化学课堂教学效率进行了一些尝试,希望能起到抛砖引玉的作用。一、演示美演示是指利用实验或实物、图表把事物的过程显示出来,让人认识或理解。课堂教学演示美是指“教师巧妙利用实验操作或现象、图表把化学反应过程或化学思想展示出来,让学生在惊奇快乐中产生精彩的思维”。如演示硅酸胶体形成的实验,向盛有硅酸钠的酚酞溶液的试管中,滴加盐 Socrates said: “beauty is function, the United States is effective ”. This shows that the United States can improve efficiency, the author used the United States to improve the efficiency of chemistry classroom teaching a number of attempts, hoping to play a valuable role. First, the demonstration of the United States is the use of experiments or in-kind, chart shows the process of things that people know or understand. Classroom teaching is the United States refers to “teachers clever use of experimental operations or phenomena, the chart shows the chemical reaction process or chemical ideas, so that students have wonderful ideas in the surprising joy ”. As demonstrated in the experiment of silicic acid gel formation, to a test tube containing sodium silicate phenolphthalein solution, a solution of salt