例题往往是一节课教学重点的载体,是教学难点突破的重要媒介,例题的选用直接影响到教学目标的达成程度,以及课堂效果的好坏。因此,在一节课的设计中,教师总会对例题的选择下一番工夫。前不久,我校一青年教师上了一节《组合图形的面积计算》的研讨课。课后,大家对例题的应用产生 Examples are often the teaching of a class of teaching is the carrier of teaching difficult breakthroughs in an important medium, the selection of examples directly affect the achievement of teaching objectives, as well as the quality of the classroom. Therefore, in the design of a class, teachers will always make a choice of examples of the next time. Not long ago, a young teacher at our school presented a seminar entitled “Area Calculation of Combinatorial Graphics.” After class, we produce examples of the application