【案例前的思考】◆课堂上怎样组织一年级学生进行估数活动?◆估数活动对促进学生数感的形成起多大作用?◆怎样才能做到让学生学生活中的数学?【背景介绍】北师大版数学实验教材第二册第一单元的第二课时是“数豆子”。本节课的教学目标是“初步体验数与生活实际的密切联系;在? 【Pre-case Thinking】 ◆ How to organize the first grade students in the classroom to conduct the estimation activities ◆ How much can the estimation activities contribute to the formation of the students 'sense of numbers ◆ How to make the students' living mathematics? 】 Beijing Normal University version of the second edition of the first unit of mathematics teaching the second lesson is “a few beans.” The teaching goal of this lesson is "the initial experience of the number of close contact with the reality of life;