论文部分内容阅读
不久前,听了纪莉老师的“压强”复习课。纪老师在这节复习课上精心准备的四个实验非常有趣有效。她先带领学生复习压强的概念。要弄清压强的概念,必须先搞清压力和受力面积的关系。纪老师组织学生做了一个实验——“气球上站人”。她用四个吹得半饱的气球支在木板下,让学生站到木板上。起初,学生都有畏惧心理,担心气球会被压爆。纪老师鼓励学生大胆站上去,并找两位同学保护。在两位同学的帮助下,体格较壮的李磊同学小4
Not long ago, listened to the “pressure ” review class of teacher Ji Li. The four experiments that Teacher Ji carefully prepared in this review session are very interesting and effective. She first led the students to review the concept of stress. To understand the concept of pressure, we must first understand the relationship between stress and stress area. Ji teacher organized students to do an experiment - “Balloon man on the station.” She used four blown balloons under the wooden board to get the student to stand on the board. At first, students were afraid and worried that the balloon would be crushed. Ji encourage students to stand up boldly and find two classmates to protect. With the help of two classmates, Li Lei, a physique and strong student, is small