“秒的认识”是人教版小学数学教材三年级上册第五单元的一节内容。时分秒对于学生来说相当抽象,教过这一内容的老师可能会发现,学生对于时分秒的单位换算能做到准确无误,但是估计某个活动时间的长短或者给某个活动选择一个合适的时间单位,学生往往会出现错误。究其原因,是因为学生在学习时缺乏对这些时间单位的感知和体验。为了使抽象的时间变得具体,变得丰富多彩,教学时我做了如下尝试,使抽象的课堂不再枯燥。 “Seconds of understanding ” is a section of the fifth unit of the third edition of the PEP textbooks for PEP. Time-minutes and seconds are quite abstract for the students. Teachers who have taught this may find that students can make accurate unit-hour conversions, but estimating the duration of an activity or choosing a suitable one for an activity Time units, students tend to be wrong. The reason for this is that students lack the awareness and experience of these time units during their studies. In order to make the abstract time concrete and colorful, I did the following in teaching so that abstract classes are no longer boring.