The state operates a system of quality control run by experts.  Hundreds of experts and researchers ensure the quality of public schools. It is presumptuous for a parent to think they know how to teach a child better than that accumulated wisdom. Just because the child is a product of that individual does not mean that the education knowledge of the parent surpasses that of professionals in that field who have spent years training1. Furthermore, even the best teachers can be improved by the insight of a third-party; such evaluations are not accessible to home-schooling parents. The danger is that 'From the government's perspective, the world of home education is full of unknowns'; there are not sufficient measures of quality control in place to protect the child and their right to a comprehensive education. 1'Home truths: do we need yet another inquiry into home education?' from Guardian website