设计说明框架是指教学设计拟定的基本教学步骤,师生学习的大体路径。师生的教学活动基本要在这个框架内进行,以避免教学的盲目性。在教学中要想突出学生的主体地位,这个框架内就必须留足教学生成的空间,这就需要软设计。软设计要求教师要有多种教学情况的假设,能依据学情,让学 Design Description Framework refers to the basic teaching design of teaching steps, the general path for teachers and students to learn. Teaching activities of teachers and students should basically be carried out within this framework to avoid teaching blindness. In teaching to highlight the dominant position of students, this framework must stay within the teaching space, which requires soft design. Soft design requires teachers to have a variety of teaching conditions assumptions, based on learning, learning