My professionalism has been called into question. I have told a child off by saying, "Don't speak to me like that. Do not answer me back." At the time there was my team leader, two other teachers, one teaching assisstant and the school business manager present. The school business manager then went to the headteacher and claimed that I had been 'kicking off' at the child and that the headteacher had better come and diffuse the situation. Now the headteacher does not want me to continue teaching this child. All of the other staff members have not been asked about the incident. What should I do? Thanks in advance.