教学北师大版国标本教材一年“级数豆子”一课中,着重培养学生的估算意识、创新意识,增强学生的数感。在估算的活动中,教师要注重引导学生应“用比较”来进行估计,这是一种解决问题的重要策略。教学中,我是这样做的:用手任意抓一把豆子放在透明的杯子里,让学生估一估杯子里一共 Teaching Beijing Normal University version of the national standard textbook One year “class beans” class, focusing on training students in the assessment of awareness, sense of innovation, enhance the sense of number of students. In the estimation of activities, teachers should pay attention to guide students to “compare” to be estimated, this is an important strategy to solve the problem. In teaching, I did something like this: I grabbed a handful of beans and put them in a transparent cup, letting the students evaluate the cup