学生是教学活动的主体,是学习的主人,这不仅应当是教育工作者的一种理念,更应当采取适应的方式,落实这一理念。教学中,我把问题情境活动化,就是让学生投身到“问题情境”中去活动,增长智慧,提高能力。这有利于保证学生在教学中的主体地位,对于促使学生从动作思维向具体的形象思维过渡也是十分有利的。在教学《平行四边形》中我首先利用以旧引新,出示三角形,提问:三角形我们是通过什么方法研究的?类比三角形,四边形我们都要研究那些内容?一般四边形:边、角;特殊四边形:从 Students are the main body of teaching activities and the masters of learning. This should not only be an idea of ​​educators, but should also be adapted to implement the concept. In teaching, I use the activity of the problem situation to let the students devote themselves to activities in the “problem situation” to increase their wisdom and ability. This is conducive to ensuring students’ dominant position in teaching. It is also very beneficial for students to make the transition from the action thinking to the concrete image thinking. In the teaching “Parallelogram” I first use the old introduction of new, showing the triangle, the question: Triangle What we study? Analogy triangle, quadrilateral We should study those elements? General quadrilateral: edge, angle; Special quadrilateral: From