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【课前思考】回顾“平均数”的教学历史,一个最大的变化是:原本作为应用题范畴的求平均数,现已划入统计内容,要作为统计概念来进行教学。《数学课程标准(2011版)》明确指出:统计的核心是数据分析。这就决定了“平均数”的教学目标,应从过去注重平均数的求法,强调数量关系以及算法的多样化,转变为丰富和深化对平均数意义的理解,并让学生在收集、整理、分析数据的过程中,感受到
[Reflections before class] Reviewing the teaching history of “average”, one of the biggest changes is that the average of the original category as a problem has been included in the statistical content and should be used as a statistical concept for teaching. “Mathematical Curriculum Standard (2011 Edition)” made it clear: the core of statistics is data analysis. This determines the teaching goal of “average” from the past, focusing on the average approach, emphasizing the relationship between quantitative and algorithm diversification, to enrich and deepen the understanding of the meanings of the mean, and allow students to collect, organize , The process of analyzing data, feel