阿常作品集,纸的发明,第二课时,纸的发明第二课时,生词学习,造纸术 伟大 创造 记录 蔡伦 积累,携带 保存 制作 一册书 学富五车,经验,朝鲜 欧洲 社会 阿拉伯,造纸术 伟大,创,造 记录,蔡伦,积,累,携,带 保,存,制,作 一册书 学富五车,经验,朝,鲜,欧洲,社,会 阿拉伯,chu,n,c,i ln,li,xi,cn,zh,xi,n,u zhu,sh,生词学习造纸术 伟大 创造 记录 蔡伦 积累 造纸,段意归纳,造纸术是中国对世界的伟大贡献之一。,第一部分,(,1,自然段),总,纸的发明过程,。,第二部分,(,24,自然段),分,我国造纸术影响了全世界。,第三部分,(,5,自然段),总,段意归纳造纸术是中国对世界的伟大贡献之一。第一部分总纸的发明,默读第,2,3,自然段:,1.,回顾,古时候人们都用什么方法写字。,2.,用“”标出这些方法的优点、缺点。,默读第23自然段:,要记录一件事,就用刀把文字刻在龟甲和兽骨上,或者把文字,铸刻,在青铜器上。,后来,人们又把文字刻在竹片和木片上。,这些竹片、木片用绳子穿起来,就成了一册书。,再后来,有了蚕丝织成的帛,就可以在帛上写字了。,要记录一件事,就用刀把文字刻在龟甲和兽骨上,或者把文字铸刻在,铸刻,:,铸造,雕刻。本文指铸刻在殷周青铜器上的铭文,也叫钟鼎文。,古人把文字,铸刻,在青铜器上。,铸刻:铸造雕刻。本文指铸刻在殷周青铜器上的铭文,也叫钟鼎文。,(部编三下公开课)10,c,册,c册,8,发展过程,先民们做出的这些尝试,有什么优点或缺点?,笨重,阅读、携带、保存都很不方便。,比竹片、木片轻便。价钱太贵,不能普及。,发展过程先民们做出的这些尝试,有什么优点或缺点?笨重,阅读、,人们用蚕茧制作丝绵时发现,盛放蚕茧的篾席上,会留下一层,薄片,,可用于书写。,哎,养了一年蚕,就十张纸。太少了!,mi,ji,n,bo,人们用蚕茧制作丝绵时发现,盛放蚕茧的篾席上,会留下一,考古学家发现,在两千多年前的,西汉,时代,人们已经懂得了,用麻来造纸,。,粗糙,不便书写,考古学家发现,在两千多年前的西汉时代,人们已经懂得了,(部编三下公开课)10,默读第,4,自然段:,1.,蔡伦用什么办法改进了造纸术?,用“,”画出来。,2.,这种纸有什么特点?,用“”画出来,默读第4自然段:,大约在一千九百年前的东汉时代,有个叫蔡伦的人,吸收了人们长期积累的经验,改进了造纸术。他把树皮、麻头、稻草、破布等原料剪碎或切断,浸在水里捣烂成浆;再把浆捞出来晒干,就成了一种,既,轻便,又,好用,的纸。,东汉时代,大约,改进,大约在一千九百年前的东汉时代,有个叫蔡伦的人,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,15,看图复述:东汉的蔡伦是怎么制造出纸的?,收集原料,剪碎、切断,浸水、捣烂成浆,晾晒成品,看图复述:东汉的蔡伦是怎么制造出纸的?收集原料剪碎、切断浸水,16,问题探究,为什么只有蔡伦改进的造纸术传承下来了?,这些写字的方法,只有少数人能用,不能普及。,问题探究为什么只有蔡伦改进的造纸术传承下来了?这些写字的方法,用这种方法造的纸,原料容易得到,可以大量制造,价格又便宜,能满足多数人的需要,所以这种造纸方法就,传承,下来了。,用这种方法造的纸,原料容易得到,可以大量制造,价格又,18,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,我国的造纸术首先传到邻近的朝鲜半岛和日本,后来又传到阿拉伯世界和欧洲,极大地促进了人来社会的进步和文化的发展,影响了全世界。,说一说:我国造纸术的传播对世界文化产生了怎样的影响?,我国的造纸术首先传到邻近的朝鲜半岛和日本,后来又传到阿拉伯世界和欧洲,,极大地促进了人来社会的进步和文化的发展,影响了全世界。,鲜,鲜,xin,xin,(),(),鲜艳,朝鲜,状元成才路状元成才路状元成才路状元成才路状元成才路状元成才路,19,(,1,)这两个自然段在行文结构上是什么关系?,问题探究,自由朗读,1,、,5,自然段。,(1)这两个自然段在行文结构上是什么关系?问题探究自由朗读1,造纸术的发明,是中国,对世界文明的伟大贡献,之一,。,我国的造纸术首先传到邻近的朝鲜半岛和日本,后来又传到阿拉伯世界和欧洲,极大地促进了人来社会的进步和文化的发展,影响了全世界。,造纸术的发明,是中国对世界文明的伟大贡献之一。我,(,1,)这两个自然段在行文结构上是什么关系?,问题探究,前后呼应,自由朗读,1,、,4,自然段。,(1)这两个自然段在行文结构上是什么关系?问题探究前后呼应自,拓展运用,写一段号召大家节约用纸的话。,造纸需要大量的树皮,如果大量砍伐树木肯定会破坏环境,现在请你写一段让大家节约用纸的话。,拓展运用写一段号召大家节约用纸的话。造纸需要大,再见,再见,