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1、学习必备欢迎下载平方根说课稿各位领导、各位老师:大家好 ! 今天我跟大家说课的题目是: 八年级数学上册第四章第一节 平方根的第一课时内容。下面,我将从教材分析,教学目标分析,教学方法,学法,这几个方面进行阐述。一、说教材:1、教材所处的地位和作用:在此之前,学生已经学习了有理数、有理数的乘方、用字母表示数等知识,这为过渡到本节起着铺垫作用。本节主要学习平方根概念和性质,在运算方面,引入了开方运算,使学生掌握的代数运算由原来的加、减、乘、除、乘方五种扩展到六种,建立起较完善的代数运算体系。本节内容既是对前面所学知识的深化和发展,也是今后学习二次根式、实数的预备知识,还是用直接开平方法、公式法解一
2、元二次方程的重要依据。因此,本节处于非常重要的地位,起着承前启后的作用。2、教育教学目标:根据上述教材分析,考虑到学生已有的认知结构心理特征,制定如下教学目标:(1) 、知识与技能 :.知道数的平方根的概念;.会用根号表示一个数的平方根;. 知道开平方与平方互为逆运算;.会根据平方根的概念解题。(2)过程与方法: 通过对平方根概念及性质的探究,渗透分类讨论数学思想方法,提高数学探究能力和归纳表达能力。(3)情感、态度与价值观:鼓励学生积极主动地参与教与学的整个过程,激发学生求知的欲望,增加学生学习数学的兴趣与信心。名师归纳总结 精品学习资料 - - - - - - - - - - - - -
3、- -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 1 页,共 4 页 - - - - - - - - - 学习必备欢迎下载3、教学重、难点本节课的重点是平方根的概念和性质。因为平方根概念和性质始终贯穿本章,正确理解这两个概念是学好本章的关键。本节课的难点是会根据平方根的概念解题。二、说教法与学法:采用循环差异教学模式,先让学生自学,然后小组内学,然后教师带领学生学。以上是我关于“平方根”第一课时的有关设想,不足之处,请各位评委、各位老师批评指正!名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精
4、选学习资料 - - - - - - - - - - - - - - - 第 2 页,共 4 页 - - - - - - - - - 学习必备欢迎下载知道开平方与平方互为逆运算;会根据平方根的概念解题。某纸箱加工厂, 有一批长为40cm 的正方形硬纸板,现准备将此纸板折成没盖的纸盒。首先在四个角上截去四个相同的小正方形,然后做成底面积为625cm2的纸盒子,想一想,你怎样求出截去的小正方形的边长?67名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 3 页,共 4 页
5、- - - - - - - - - 学习必备欢迎下载初二口语 3、4 单元My cousin is crazy about DIY. He loves to repair things and decorate his house. I bought him some books about DIY for him and I also advised him to take a course in DIY. But this just made him angry he says he already knows everything about it. So instead, I am r
6、eading all the books myself and attending lessons every Saturday. Now I know much more than my cousin! 那是晴朗、暖和的一天, 太阳在晴朗,湛蓝的天空中照耀. 世界公园非常远, 我们乘公共汽车用了大约两个小时到达那里。路上交通很拥挤,旅途有点乏味。我们终于到达了公园。我们都迫不及待地下了公共汽车。很快整个世界展现在了我们面前!那里有100 多处世界各地景点的模型,它们虽小但很壮观。It was a fine warm day. The sun was shining in a clear bl
7、ue day. The World Park is quite far away. It took us about two hours to get there by bus. There was a lot of traffic on the way and the journey was a little boring. We finally arrived at the park. All of us couldn t wait to get off the bus. Soon the whole world was there in front of us! There are mo
8、dels of more than a hundred places of interest from all over the world. They are small but wonderful 妈妈的生日就要到了,所以我决定我自己给她制作一张生日卡片。我计划制作上面有玫瑰花的卡片。完成它花去了我2 个小时。在那期间,许多事都出错了。我不停地把单词拼错了,我太兴奋。这是我给妈妈制作的第一张卡片。我希望她喜欢。Mum s birthday is coming, so I decided to make her a birthday card by myself. I planned to
9、make the card with some roses on it. It took me two hours to finish it. Lots of things went wrong during that time. I kept spelling the words wrong. I was too excited! This is the first card I made for Mum, I hope she will like it. 今天是令人惊奇的一天因为我们在仅仅的一天内看到了世界上主要的名胜古迹。歌舞表演也很精彩。我们了解了很多种不同的文化。在网站上你可以看到这
10、次旅行的照片。基蒂的同学丹尼尔把他们放到了主页上。你可以亲自去看看。It was an amazing day because we saw the main sights of the world in just one day. The song and dance shows were also wonderful.We learnt a lot about different cultures. You can see some photos of the trip on the Internet. Kitty s classmate Daniel put them on his homepage. Go and see for yourselves!名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 4 页,共 4 页 - - - - - - - - -