实验教学是中学物理、化学和生物教学中的重要内容之一,演示实验起到很好的示范作用,然而笔者在水平讲台上做演示实验时,很多同学根本看不到,农村学校在标准化建设中实施了“班班通”工程(即安徽省实施的班班通多媒体互联网),但并没有配备价 Experimental teaching is one of the important contents in physics, chemistry and biology teaching in middle school. The demonstration experiment plays a very good role in demonstration. However, when the author conducts the demonstration experiment on the horizontal platform, many students can not see it. The standardization of rural schools In the implementation of the “class classes through ” project (that is implemented in Anhui province classes through multimedia Internet), but not equipped with the price