“年、月、日”的学习属于时间概念学习的一个范畴。低年级的孩子能理解那些与他们的生活最为接近的时间单位,如时、分。随着年龄的增长,学生才能逐步理解离他们生活较远的时间单位,如年、月等。但是作为三年级下册的孩子,已经在三年级上学习了时、分、秒这些相对较短的时间单位,同时,年、月、日与我们的生活密切相关,因此对于时间的认识已有一定的理论与实践基础。一、原教学设计的任务描述与比较(一)同课异构之任务描述 “Year, month, day ” learning belongs to a category of time concept learning. Children in lower grades can understand the units of time closest to their life, such as hours and minutes. As they grow older, students gradually understand the units of time farther away from their lives, such as year, month, and so on. However, as a third grader, I have studied the relatively short time units of hours, minutes and seconds in the third grade. At the same time, the year, the month and the day are closely related to our life. Therefore, A certain theoretical and practical basis. First, the original teaching design task description and comparison (a) the same task heterogeneous description