Orthodontics for high school students requires examination, analysis, collection of case information before treatment, diagnosis and treatment planning, and commencement of treatment. 1. Examination, checking whether the patient’s jaw and face are symmetrical, whether there is any disorder in the temporomandibular joint, the occlusal relationship in the mouth, the type of malocclusion, the general health condition, and informing the patient if there is any disease that is not suitable for orthodontic treatment. 2. Analysis, taking surface tomography and lateral cephalometric films, making measurements, measuring and analyzing the arch morphology, measuring and analyzing the alveolar and basal bone, assessing the risks in the treatment of the teeth, jaws and craniofacial surface and predicting what may happen in the course of the orthodontic treatment. 3. Patient case information collection, taking surface tomography and lateral cephalometric film records and keeping them, taking intraoral photographs, frontal photographs, lateral photographs, smile photographs records and keeping them, which are used to record the situation before the orthodontic treatment, and used to compare with the situation after the orthodontic treatment. 4. Diagnose and make treatment plan, analyze the classification of the patient’s malocclusion, diagnose him/her, make treatment plan, expect the time for the division of correction, plan the cycle of correction, inform the patient and communicate with him/her. 5. After doing all the above work, read and agree with the patient to sign the informed consent for orthodontic treatment, inform the patient; orthodontic treatment process, to follow the doctor’s instructions to cooperate with the doctor, and inform the risks and possible situations that may occur during the orthodontic treatment, the patient is informed and agrees to sign, and then the orthodontic treatment can begin.