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教学内容:北师大版义务教育六年制小学《数学》教科书第十一册“圆的周长”一、大胆猜想师:我们已经知道什么是圆的周长。关于圆的周长,同学们还想知道什么?生:怎样计算圆的周长?师:这个问题提得好。那你们先想一想,圆的周长可能与什么有关?生1:我认为圆的周长和半径有关,半径越长,圆就越大。
Teaching content: Beijing Normal University version of compulsory education six-year primary school mathematics textbook eleventh “round perimeter ” a bold guess division: we already know what is the circumference of the circle. On the perimeter of the circle, what else do the students want to know? Student: How to calculate the circumference of the circle? Teacher: The question is well mentioned. Then you first think about the circumference of the circle may be related to what? Health 1: I think the circumference of the circle and radius, the longer the radius, the greater the circle.