Teachers' evaluation language is a classroom skill that teachers must master. It is also an assessment method to judge a teacher's professional quality by evaluating students' answers to questions and problems encountered in learning. The evaluation of students is so important because the power of language is infinite. An encouraging evaluation can make students interested in the subject and explore the spirit. It will also make students lose confidence and even interest in learning. A good teacher evaluation can certainly suit local conditions, solve the thorny problems that students encounter, and encourage students to explore the mysteries of learning independently. This paper takes the classroom teaching of primary school mathematics as an example to discuss how teacher evaluation can play a powerful role in mathematics classroom.

Keywords: teacher evaluation; Primary school mathematics; Classroom teaching;

Teacher evaluation strategy is a favorable means of classroom teaching. Teachers should be good at using this weapon and achieve teaching effect through effective evaluation terms. So, how to use evaluation correctly in primary school mathematics classroom teaching? On what occasions and under what problems can teachers use the best evaluation terms to achieve the expected results? All need to be studied and explored. The student's answer to the question is incorrect, so the teacher should not be eager to reject the student's answer. This will not only hurt students' self-esteem and enthusiasm for learning, but also reduce the enthusiasm of other students to speak actively and answer questions by half. The classroom is a world where teachers strategize. Teachers should master students' every move through correct evaluation and get twice the result with half the effort. Primary school mathematics is very important for students' learning foundation. It is necessary to formulate a perfect system to cultivate students' interest in mathematics and cultivate their mathematical thinking and exploration spirit. "Mathematics Curriculum Standard" points out: "The purpose of evaluation is to fully understand students' learning process, stimulate students' learning enthusiasm and promote their all-round development." Evaluation is also a powerful means for teachers to reflect and improve teaching.

(A), update the concept of evaluation

Traditional teacher evaluation is that teachers give positive encouragement and praise through students' classroom performance, but with the continuous improvement of students' psychological quality, teachers need to update their evaluation concepts. Teacher evaluation is not only a positive praise and encouragement to students, but more importantly, it is to discover students' potential abilities and talents through their classroom performance, so that students can learn and explore things independently and stimulate their creativity. That's all that matters. Or through students' self-evaluation and mutual evaluation, teachers and students can participate in classroom mutual evaluation. Sometimes not only does a teacher's evaluation benefit students, but also mutual encouragement among students can greatly stimulate students' interest in learning.

Generally speaking, classroom evaluation is a diversified and multi-directional development, aiming at cultivating students' comprehensive mathematical thinking, improving students' spirit of mathematical exploration and innovative thinking, improving the quality of mathematical thinking and giving full play to the real role of classroom evaluation. Teachers should accurately judge students' learning level in class and give them a scientific and fair evaluation. Praise does not mean ignoring students' mistakes, but guiding students to cross wrong thinking habits and develop good mathematical thinking and attitude in a positive way. Let students participate more actively, let evaluation really become a powerful driving force to promote students' learning mathematics, and let evaluation accompany students to grow up happily.

(b) Respect students' personal development and learning style.

In the classroom teaching activities of primary school mathematics, teachers should respect students' personality development while imparting knowledge, and teaching evaluation should also respect students' personality development, which has been advocated by the new curriculum standard. Primary school mathematics is the best stage to learn the basic concepts of mathematics and lay the foundation for mathematical thinking. It is necessary to master the basic knowledge and skills of mathematics. Basic knowledge is not only a boring concept in textbooks, but also something that students need to memorize by rote. Instead, students need to explore and gradually establish self-awareness, which is a process of self-pursuit and a stage of gradually cultivating students' self-personality and learning style. For example, in the course of parallelogram area calculation, before the teacher teaches the students the calculation formula of parallelogram, the teacher asks the students a question first, how to calculate the area of parallelogram? The students began to think about how to find this area. Teachers can ask students what unique suggestions and ideas they have. If a student says that a parallelogram is divided into two triangles and a rectangle, then the student's spatial imagination must be extraordinary. The teacher can praise him and tell him what kind of ability the spatial imagination is. Students' self-confidence is satisfied, their abilities are recognized, and they will be full of confidence in their excellent places in the future, which is very important for their future development.

(C) respect for individual differences of students

The evaluation of mathematics classroom teaching in primary schools is a feedback and test for students' individual learning results. It is an individual evaluation made by teachers according to students' classroom performance, and it is an important teaching method and means. Teachers should be good at discovering students' individual characteristics while evaluating and positioning students. Teachers should not only evaluate students' teaching, but also consider students' learning effect, cultivate students' thinking cognition and personality development, respect students' individual differences and embody the people-oriented teaching principle. For example, some students are introverted and are not suitable for displaying their talents in public. Teachers can help students regain their confidence by praising them in public. For extroverted students, they can actively answer questions to promote the role of classroom atmosphere, and also exercise students' oral expression ability.

We can't just focus on the answers to questions and ignore the students' way of thinking. As a math teacher, we should be good at discovering students' unique personality thinking. There are no two identical leaves in the world. Everyone is an independent individual and should be explored and cultivated to discover his unique brilliance. Teachers and students learn from each other. Only through students' feedback can teachers improve their teaching plans better. Teachers and students are subjects and objects of each other, and teaching evaluation should be a platform for teachers and students to respect, love, help and learn from each other. Really embody humanistic care and lay the foundation for establishing a new relationship between teachers and students. There are individual differences among students,

For example, when studying the chapter "Understanding Multiple Numbers", a student read 80080 as "8008". As a teacher, he is in no hurry to evaluate. If he immediately denies the students' views, it will certainly hurt their self-confidence. Teachers can patiently tell students that after careful examination, teachers believe you can. Finally, I asked the students the reason for their mistakes, because they thought they should read only the middle zero and not the last zero. It seems that the students misunderstood the concept mentioned by the teacher. At this time, the teacher gave an evaluation: "If I lent you 80,800 yuan, would you like to pay you back 80,800 yuan now?" The students laughed. Obviously, teachers' evaluation of students has aroused widespread concern. Because teachers don't simply criticize students' mistakes, students can easily accept teachers' comments.

(D) The result is more important than the process.

The purpose of teaching evaluation is to let students really learn the connotation of knowledge and give comfort and encouragement to students when they make mistakes without reducing their self-confidence. When students show their unique way of thinking and creation, they can be appreciated and affirmed, and given correct guidance. The result of students' answering questions is very important, but the process is also very important. Teaching evaluation can't be done overnight. We should learn to guide students' thinking ability and thinking mode, which is formative evaluation. Formative evaluation is to adjust and improve the teaching activities in the teaching process by achieving certain teaching objectives, so as to ensure that the teaching objectives can be formulated according to the teaching requirements. The main purpose of formative assessment is to improve and improve the teaching process. Relatively speaking, summative evaluation is a summary and feedback of a stage of learning, and the ultimate goal of the comprehensive teaching quality of the subject is to make a conclusive evaluation through stage learning. The teacher's evaluation of students is to let students know their learning level and give them a learning conclusion or grade division. Half of the grade is the standard for testing academic performance, but the other half is the formation of students' classroom thinking, which cannot be measured by grades. It depends on how students use this way of thinking to solve problems in their later lives. Formative evaluation can better reflect democracy and humanistic spirit.

Conclusion: Let evaluation accompany students to grow up happily. Classroom evaluation plays a very important role in primary school mathematics. Teachers should be fully prepared before class. The questions that need to be asked and how to deal with students' wrong answers are all tests of a teacher's self-professionalism. At the same time, education is not only the responsibility of teachers. At home, parents should also fulfill the responsibility of being a good teacher of children's enlightenment. Encourage and comfort children when they encounter math problems in their lives. Proper evaluation will make them grow better. Through the evaluation of parents and teachers, children can better understand their learning ability and talent, so as to better adjust themselves, cultivate students' autonomous learning ability, improve students' innovative thinking, and establish and improve students' mathematical core literacy.