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首先,引导学生理解“面积”的含义。教师可设计三个教学环节: 1.观察物体表面的大小.初步建立“面积”的概念。教师要求学生观察数学课本的封面和铅笔盒盖的表面、教室门的正面和黑板正面、课桌面和地面,比较每组物体表面的大小。学生凭直观回答出谁大、谁小后,教师点题:物体的表面有大有小,物体表 相似文献
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竞赛活动对表现欲强烈的小学生有着极大的吸引力。它能激发学生兴趣,调动学习的积极性和主动性,有效地培养学生的自信心。因此,学校要认真组织竞赛活动。一是面向全体学生,力争人人参赛。竞赛活动要克服面向部分学生、少数学生的现象。能让全体学生参与的,就不要让部... 相似文献
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I have a big family. There are 42 brothers and sisters in it. We study and live happily. I think everyone has guessed that this big family is my class. It's one of the best classes in our school. In our family, everyone has his own character, such as clever boy Cao Cao, pretty girl Xiao Jie, little artist yao Bin and so on. Wen Bin is my brother. Perhaps you will think that he is a gentle boy when you hear the name. He looks quiet. But when he comes to the playground, he changes completely. He looks like a cute monkey. Although each of our brothers and sisters are not the same, we are very united (团结的). Our class is a warm family. Welcome to our home. I believe you will love it at once. 相似文献
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