you can try correspondence school, but they need for you to state the reason why your child needs to stay home. You could try the psychological pressure at school, but they need statements from psychologists, which is invasive. There is a gifted child exemption, e.g. child needs to attend concerts or training overseas, but that is hard to fulfil. There is an exemption for parents who move around to work, so only have two or three months for the child to attend a certain school.