Abstract: Comment is an important part of middle school mathematics classroom teaching. A good exercise class can achieve the effect of checking and filling gaps, broadening ideas and improving students' ability. A good exercise class is of decisive significance for improving teaching quality and cultivating efficient talents. In fact, like a new lesson, we should grasp three links: preview before class, attendance in class and homework feedback.

Keywords: comments; Architecture; Thinking; Feedback;

Teaching evaluation is an important part of middle school mathematics classroom teaching. A good exercise class can achieve the effect of checking and filling gaps, broadening ideas and improving students' ability. A good exercise class is of decisive significance for improving teaching quality and cultivating talents efficiently, while arbitrary exercise classes will only make students sleepy. How can we get the best results from the lecture on examination papers? In fact, exercises should be taught and evaluated like the new curriculum, and three links should be grasped: pre-class preparation, classroom and homework feedback.

First, preparation before class

"Everything is established in advance, and if it is not planned, it will be abolished." The same is true of practice, attending classes and evaluating classes. It is necessary to prepare before class, especially the teaching goal orientation of attending classes and evaluating classes. What should we do well before class? We should start from four aspects: reading, checking, analyzing and choosing.

1, pay attention to "reading"-understand the "crux"

"Reading" means "finding out", finding out students' knowledge, study habits and learning methods. This is the best way for teachers to master first-hand reliable information. "The requirement of reading is to correct students' homework in batches and make statistics and classification. The specific approach is: multiple-choice questions should not only count the wrong questions in the whole class, but also record the wrong questions selected by the students in each wrong question; Answer the question "Look" at the steps and habits of answering the question. The quality of "reading" should be high, the right and wrong should be clearly defined, and the evaluation should be standardized to create a rigorous, serious and serious atmosphere for students. The key to "reading" is to understand and collect.

2. Carefully "check"-design a "treatment" plan

Look up mistakes, sloppy points, forgotten points of knowledge points, chaotic points and blind spots of thinking, and design practical "treatment" schemes for students according to these "points". The sloppy points are "hammering hard to forget knowledge", "re-remembering from different angles", "putting up scaffolding", "letting it step in, easy to mix" and "contrast and strengthening" to clarify its connotation and extension.