How to write a notice of parents quitting the group

Hello, teachers and parents! I am the parent of XXX. My child has finished this stage of study, and I am going to quit the league. Today, I will say goodbye to you. First of all, I am very grateful to the teachers for their concern and help to my children. My children's progress in learning is inseparable from the careful training of teachers. Secondly, I am also very grateful to other parents in the group for their valuable parenting experience. Finally, I wish you all success in your work and good health!