笔者是我国甘肃地区一所技工学校的数学教师,从教十数年,最明显的感受就是现在技工学校(简称技校)的数学课太难教了——学生个性强,基础差,课时少,学校也很少重视,专业课老师又抱怨我们没给专业课打好基础,笔者常为在现状下怎么才能给学生讲好、讲透并且让学生学好而头痛不已。最近又一次讲到了《对数的概念》,有些许心得,与各位同行分享,也请大家多提批评意见! The author is a math teacher in a mechanic school in Gansu. From the teaching of ten years, the most obvious feeling is that math class in technical school (referred to as technical school now) is too difficult to teach - the students are characterized by strong personality, poor foundation and few classes, Also pay little attention to, professional teachers also complained that we did not lay a good foundation for the specialized courses, the author often in the status quo how to say good to the students, to speak thoroughly and let students learn a headache. Recently talked about the concept of “logarithm,” a little bit of experience, to share with your colleagues, but also ask everyone to criticize!