I am here to file a complaint against your school system and your abuse towards children in the premises. Your abuse cannot keep continuation. However, because I do not have the authority I can only give advice to better your teaching and the overall behavior toward students.
The first complaint is about culture. You have no right to assimilate children to Christianity and I suggest you allow them to study their culture, rituals and the ways of their ancestors. I suggest that you allow them to do all this because then they will feel less threatened and feel like you care about the way they act who they are and what they believe in. If you really must teach your culture as another option but do not force them into this new unfamiliar way that they do not wish to follow.
The second is dress code and names and such. They have come with their own clothes and their own things that they wish to use. Also the children were born and given names that their parents gave them and so you let them keep their name no matter what you think. If they want to change their name, assist them in any way you can. Do not give them numbers that they have to stich into their belongings. They will be known in anyway they wish to be known. They are human beings just like you and I, and they should have the same rights. So overall I think you should treat them better and I think you should treat them like you would treat your children.
Have a nice day an I hope you took my suggestions into account,
Someone who cares abut the kids.