思维总是从问题开始.教师要激发学生的思维,设法创设情景,让学生感受到问题的存在是关键.也就是说,所提问题应让学生觉得有一定的手段可施,实践时却又因它的灵活性而无济于事,从而产生解决问题的思维过程.教师若能在问题中不断地创设一些变化,给学生以新异感,学生的思维能力便会得到更好地发挥.笔者曾在复习求异面直线所成的角的教学中,注重在这方面下功夫,取得了较为理想的效果.点滴做法如下. Thinking always starts with problems. Teachers need to inspire students’ thinking and try to create scenarios, so that students feel that the existence of problems is the key. That is to say, the questions raised should make students feel that there is a certain means available, but practice Because of its flexibility, it is useless to create a problem-solving thinking process. If a teacher can continuously create some changes in the questions and give students new feelings, the students’ thinking ability will be better developed. In the course of reviewing the angles formed by different straight lines, we focused on making efforts in this area and achieved satisfactory results. The following are some examples.