I also felt that most of the United States population had too many difficulties with mental math - figuring out the results of ten percent off, for example. My purpose here is not to suggest that you copy my methods, only that you think of homeschooling as a process and make changes whenever your current approach seems like a waste of time. You have complete educational freedom. You need not wait for a new teacher or new school year. Instead, you can adapt and evolve your approach and materials as needed.
Home schooling is a process, an experimental process, at that.
Be willing to make mistakes. The more things you try, the more mistakes you make. The more mistakes you make, the faster you will find what works for your family. In Paradise, David and Micki Colfax's account of homeschooling on a remote California ranch. Nevertheless, their results included sending three homeschooled sons to Harvard.