宋朝有个画家叫文与可,他画的竹子,栩栩如生,很受人们赞扬。他的朋友晁补之,曾经写了一首诗来赞扬他,其中有两句说:“与可画竹时,胸中有成竹。”后来“胸有成竹”作为成语,用以比喻在处理一件事情之前,早已作了准备,有了一定主意。我在教学中常有这个体会,一堂课能否成功,能否讲得“栩栩如生”,也需要“胸有成竹”。即使其它条件都已具备,而未能实现这一条,也会因“巧亏一篑”而失败。常有这样的情况:教材和事例准备好了,而且按要求写好了教案,就是由于忽视了消化 In the Song Dynasty, there was a painter called Wen Keke. The bamboo he painted was very vivid and praised by people. His friends made up for it and once wrote a poem to praise him. Two of them said: “When you can draw bamboo, you have a bamboo in your chest.” Later, “there is a good bamboo” is used as an idiom to metaphorically deal with an idiom. Before the incident, I had already made preparations and got some ideas. I often have this experience in teaching. Whether or not a class can succeed, whether it can be described as “lifelike,” it also requires “being prepared.” Even if all other conditions are met and the article is not implemented, it will fail because of “a loss.” This is often the case: textbooks and examples are ready, and the lesson plan is written as required because it is ignored.