I have been teaching my 5 year olds to speak, listen, as well as read and write in English. A mother came to me concerned that I no longer teach the children to read and write English, as this will cause confusion with children learning to read and write their native language. Is there any research on this, in either direction? I do not want to drop this from my program because 1/100 parents disagrees, however if it is causing difficulty, and that one parent is right, then I want to axe reading/writing until later.