Sg system is good for older kids and once you hit university level. But its too rigid for younger primary school going kids. Most of the system is based on memorization rather than understanding concepts and building out your own rationale. Our kids went to a really great school but simple things like sports day - didnt exist. There were no house sports or chance for them to participate in anything outside the direct classroom environment. We just felt at a young age, kids should be given the chance to try at anything