随着课程改革的深入,数学课堂教学开始由严肃走向轻松,由单一走向丰富,由直白走向艺术。而课题的揭示这一环节,往往成了许多教者煞费苦心设计教学过程中首先要思考的。有些教者在公开课中为了追求新意,想出了不少花样,到头来往往是兜了个大圈子,却没有太大价值可言;但也有些教者平时教学中不善 With the deepening of curriculum reform, mathematics classroom teaching began from serious to relaxed, from a single to rich, from straight to the art. The topic of this part of the show, often become a lot of teachers have painstakingly designed the teaching process must first think. Some teachers in the open class in pursuit of new ideas, come up with a lot of tricks, often come in a big circle, but not too much value at all; but some teachers usually poor teaching