有效,字典里有两种解释:一是能实现预期目的;二是有效果。“有效问题”既要出体现学科的本质属性,又要让思维者经过努力能够解决,即所提出的问题实现提问者的预期目的或产生一定的效果。问题教学的关键在于引导学生提出有效问题。 Effective, the dictionary has two explanations: First, to achieve the desired purpose; the second is effective. “Effective problem ” should not only reflect the essential nature of the subject, but also make the thinking people can work hard to solve, that is, the proposed problem to achieve the intended purpose of the questioner or produce some results. The key to problem teaching is to guide students to put forward effective questions.