When I’m helping my son with his math homework, I go through something similar. I don’t always remember what I learned, so I end up reviewing some topics online to help him. In the end, it turns out to be a good thing, as it’s a chance to refresh things we learned but forgot.
My son is still in middle school now. It is hard to imagine how I will help him with his math homework when he enters high school.
I share the same feeling; mine is also in middle school. May God help us when they reach high school!