在教《有理数的加法》一课时,虽然学生基本掌握了有理数的概念,但是对于如何运用有理数的概念,特别是利用正负数的概念来描述问题仍显得困难。笔者运用“探究——研讨式”的教学模式,不是将现成的知识灌输给学生,而是通过精心设置一个个问题链,激发学生的求知欲,使学生在教师的 While teaching “the addition of rational numbers”, although students basically grasp the concept of rational numbers, it is still difficult to describe the problems by using the concept of rational numbers, especially the concept of using positive and negative numbers. The author uses “inquiry - seminar” teaching mode, not to instill knowledge ready to students, but by carefully setting up a chain of questions, to stimulate students’ curiosity, so that students in the teacher’s