怎样引导学生思考?怎样引发学生感悟?福建省著名特级教师、教材专家顾志能老师所授的《比万大的计数单位》一课,从提出本源性问题开始,通过本源性教学,给我们做了精彩示范。【片断一】引出师:我们学过哪些计数单位?生:个、十、百、千、万。师:还有比万大的计数单位吗?生:十万、百万、千万、亿……师:还有吗?学生继续猜:亿万、万万、十亿、千亿、百亿、万亿、亿亿……师:不知道这些是不是计 How to lead students to think? How to arouse students’ sentiment? Fujian Province famous super-teacher, textbook expert Gu Zhineng taught by the “unit of more than a million units,” a lesson from the origin of the problem, through the source of teaching to us Wonderful demonstration. Piece】 【引导 division: What units have we learned? Students: a, ten, one hundred, one thousand, million. Teacher: There are more than the million units of measurement? Health: one hundred thousand, one million, ten million, billion ... Teacher: Still? Students continue to guess: hundreds of millions, millions, billions, billions, billions Trillion, trillion ... ... Division: do not know if these are not counted