Believe it or not, you are not required to teach any subject every year. Really.
The home education law says: “At the elementary school level, the following courses shall be taught: English, to include spelling, reading and writing; arithmetic; science; geography; the history of the United States and Pennsylvania; civics; safety education, including regular and continuous instruction in the dangers and prevention of fires; health and physiology; physical education; music; and art.”
This means that at some time during the grades of kindergarten through sixth grade, you must teach these subjects to your child. It doesn’t say every day, every week, or even every year.
It would probably be foolish not to study math and reading every year! You can require that, but the law doesn’t.
Homeschooling provides an opportunity to tailor your child’s education to meet their needs and satisfy your own personal standards. Do an internet search on homeschool tailor, and you’ll find dozens of helpful articles, including this one: Tailor-Made Education