Most parents do not have any teaching qualifications.  If parents are not trained or qualified teachers how can they provide a better or equivalent quality of education than a professional teacher at a school. Even if a parent or tutor excels in one area, will they cover all the things a school does? Even if they tried to, they would not do so adequately due to sheer lack of experience and training. The point of a curriculum is that these are things we have decided as a society that children need to learn, and in order to learn they require the support of qualified teachers1. Support groups and educational text books can help, but they alone cannot turn a parent into a good teacher. 1 National Curriculum Website