略论反馈在中学数学教学中的功能白玮雄（上海市金山县朱泾中学２１０５００）所谓反馈，指的是某一控制系统在把信息输出之后，又将其作用的结果作为新信息送回原控制系统，用以调整和纠正它所输出的信息．从教学过程的总体来看，其实质也是一个信息控制系统，在此控制系... Brief introduction on the function of feedback in mathematics teaching in middle school Bai Xiongxiong (Zhuxue Middle School, Jinshan County, Shanghai 210500, China) The so-called feedback refers to the fact that after a certain control system outputs information, it sends the result of its function back to the original control as new information. System to adjust and correct the information it outputs. From the overall perspective of the teaching process, its essence is also an information control system, in this control system...