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概念是人脑反映客观事物的一种思维形式。生命科学中的许多规律、原理和方法,都得借助于有关生物学概念才能得以正确地表述。所以,在高中生物学课堂教学中,注意对学生进行基本概念的教学,就显得相当重要。多年来,我在自己的教学实践中,主要采取了以下几种方法。 一、关键词分析法 我们知道,每一概念都可以用语言来表述。语言又是由字、词、句组成的。所以,我们要讲清一个概念,就应抓住表述这一概念的关键词加以分析,才能达到让学生理解概念的目的。例如,在讲“等位基因”这一概念时,教材中是这样表述的:“在一对同源染色体的同一位置上的,控制相对性状的基因,叫做等位基因。”看了教材中的表述以后,我就向学生指出,等位基因这一概念的关键词是“控制相对性状。”只有控制
Concept is a kind of thinking form that the human brain reflects objective things. Many laws, principles, and methods in life science have to be correctly expressed with the help of biological concepts. Therefore, in high school biology classroom teaching, it is very important to pay attention to the basic concepts of teaching. Over the years, I have mainly adopted the following methods in my teaching practice. First, keyword analysis We know that every concept can be expressed in language. Language is also composed of words, words, and sentences. Therefore, if we want to clarify a concept, we should grasp the key words that express this concept and analyze it so that students can understand the concept. For example, when we talk about the concept of “alleles,” the textbook states: “The genes that control relative traits at the same position on a pair of homologous chromosomes are called alleles.” After the presentation, I pointed out to the students that the key word for the concept of alleles is “controlling relative traits.” Only control