一、案例背景教学反馈是教学活动中不可缺少的一个基本环节,是优化教学策略的重要手段。有效的反馈机制是活动目标达成的必要条件。课堂教学反馈是学生认知活动的关键环节,及时有效的课堂教学反馈能帮助教师更好地了解学生掌握知识和技能的程度,以便调整教学节奏和步骤,也能帮助学生及时了解自己的学习结果,调整自己的学习行为和学习态度,保证课堂教学的有效性。《认识平面图》是三年级数学下册“位置与方向(一)”这一单元的第二课 First, the background of the case Teaching feedback is an essential part of teaching activities is an important means of optimizing teaching strategies. Effective feedback mechanism is the necessary condition for the goal of activity. Feedback from classroom teaching is a key part of students ’cognitive activities. Timely and effective feedback from classroom teaching can help teachers to better understand students’ knowledge and skills, so as to adjust teaching rhythm and steps and help students to understand their learning results in time , Adjust their own learning behavior and learning attitude, to ensure the effectiveness of classroom teaching. “Recognition Plan” is the third grade mathematics book “Position and direction (a) ” the second lesson of this unit