一、问题设计层次化在高中化学教学中,学生基础的参差不齐和教学目标的多层次性决定了问题设计的层次性。设计的问题应由易到难、由表及里、步步深入。问题从难度上可以分为基础性问题、运用性问题和开拓性问题三类。基础性问题包括回忆、理解化学基础知识的问题。学习方式上,是第一阶段的自学阶段,要求让80%的学生学会50%的问题。 First, the issue of design hierarchy In high school chemistry teaching, student base uneven and multi-level teaching goals determine the level of problem design. Design problems should be easy to difficult, from the table, step by step. From the difficulty of the problem can be divided into basic issues, operational issues and pioneering issues three categories. Fundamental issues include memories and understanding of the basics of chemistry. The learning method is the first phase of self-study, requiring 80% of students to learn about 50% of the problems.