教与学始终是存在差距,一节课或一个单元甚至一个学期下来,教学双方往往感到力不从心,收效甚微,这就是所谓的“教学差”。成功的教学就是成功地缩小“教学差”。多年的实践证明,抓好预习也是不断缩小“教学差”的有效手段之一。 Teaching and learning is always a gap, a lesson or a unit or even a semester, the teaching often feel powerless, with little success, this is the so-called “poor teaching. ” Successful teaching is successfully reduced “poor teaching ”. Years of practice has proved that a good preview is also shrinking “poor teaching ” one of the effective means.