The concepts themselves are simple. You should be able to see how many of the things the young student would normally learn in grade school apply to a high school lesson. Sadly most students don't make the connection or have forgotten the previous lessons and don't see how they apply. So for the younger students we start off with a lesson that's easy and fun and we can make a bit of a game of it...once this is digested and mastered we add a little more covering the same ground and a bit more...