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《概念的内涵和外延》(见高中语文课本第一册)有“概念”、“内涵和外延”、“定义和分类”等内容。我觉得“内涵和外延”是这篇逻辑知识短文的教学重点。因为每一个概念都具有内涵和外延两方面的特征,通常所说的“概念要明确”,就是指概念的内涵和外延要明确;而“定义和分类”是揭示概念内涵和外延的两种逻辑方法,与“内涵和外延”有直接关系,“内涵和外延”懂了,“定义和分类”也好理解了。基于上述认识,现将本人关于“内涵和外延”的教学设计略陈如下:
“Connotation and denotation of concept” (see the first volume of high school language textbook) has “concept”, “content and extension”, “definition and classification” and so on. I think “connotation and extension” is the teaching focus of this logical knowledge essay. Because each concept has both the connotation and the extension of the characteristics of the so-called “concept to be clear,” refers to the connotation and denotation of the concept to be clear; and “definition and classification” is to reveal the two concepts of connotation and denotation Method, which is directly related to “connotation and extension”, “connotation and extension” understood, and “definition and classification” understood well. Based on the above understanding, now my teaching design about “connotation and extension” is slightly as follows: