Luo's correct evaluation of Changliu middle school students has always been the focus of modern education. In teaching, teachers can promote the improvement of students at the original level, so as to meet the requirements of the training objectives of basic education, discover students' potential and specialties, help students know themselves and build up their self-confidence. 1. Praise should come from the heart and have true feelings. 2. Encourage in time and be targeted. Teachers should give students timely and appropriate praise and evaluation, which can strengthen students in time. Therefore, teachers are required to have keen observation and resourceful language. (2) Criticism of students in teaching is essential, but the ultimate goal of criticism is to make students understand the truth and correct their mistakes. Therefore, when a teacher criticizes a student, only by entering the students' hearts, accurately grasping the students' psychological trends and skillfully using euphemistic criticism language can he receive better educational results and make the advice no longer unpleasant. 1. Let the students feel warm in a caring tone. Teachers should have lofty professional ethics and treat each student as their own child, so that you can persuade and educate students with your heart. Criticizing students should be full of love and have a strong sense of responsibility, so that students will approach you, understand you and be willing to accept your criticism. Only when teachers show warm care and selfless love to students everywhere and fully trust students will students open their hearts, tell you the truth and accept your criticism and correction. 2. Let the students feel shocked with a gentle tone. Modern education advocates "people-oriented". When criticizing students, we should also follow this line of thinking. In the face of different students, we should see their personality differences and adopt different educational methods to make the best use of the situation. For introverted, sensitive and suspicious students, we can talk to them with words such as reminding, enlightening or asking questions, and we can also criticize them implicitly with body language such as smiles and eyes. For students who are extroverted, quick-thinking and grumpy, we can communicate with them on an equal footing in a "discussion" tone, and gradually and calmly convey critical information to them, so that they can gradually realize their mistakes, gradually achieve self-discipline, self-management and continuous progress. 3. Use flexible words to convince students. When teachers criticize students, they should put forward facts, reason, convince people by reasoning, pay attention to discretion and scale, and leave room for speech. When necessary, praise can replace criticism. Praise him first and then criticize him, so that students can understand that the teacher not only sees his shortcomings, but also his achievements. In this way, students can correct their shortcomings under the guidance of teachers and receive good educational results. In short, criticism and praise should not be limited to one form, but should vary from person to person.