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课堂教学活动有效性是广大教师在教学中所追求的目标。在平时听课或教研中发现由于部分教师存在着的预设不充分,教学活动的目的不明确或活动指导不到位,导致数学活动低效甚至无效。本文就笔者平时听课教研中发现的一些问题,以案例、案例解读、修正策略,阐述提高小学数学教学活动有效性的策略。一、活动设计不科学,导致数学实验低效案例:北师大版四年级下册《三角形边的关系》教学片断。(学生用几种长度塑料管围三角形操作后,交流时出现意外
The effectiveness of classroom teaching activities is the majority of teachers in teaching the pursuit of the goal. In the usual lectures or teaching and research, it is found that due to the inaccurate preconceivedness of some teachers, the purpose of teaching activities is not clear or the guidance of activities is not in place, resulting in inefficient and ineffective math activities. In this paper, I usually listen to some problems found in the teaching and research, with cases, case interpretation, correction strategies, to explain the effectiveness of primary school mathematics teaching activities strategy. First, the activities of unscientific design, leading to inefficient mathematical experiments Case: Beijing Normal University version of the fourth grade “triangle side of the relationship between” teaching pieces. (Students use several lengths of plastic tube around the triangle operation, the exchange of accidents