What grade R U in??????????

So this is a typical question that we hear very often, being a homeschool family it makes me feel awkward.Its like when we go to the store and the cashier assumes by saying"Out of school today are we" No we are NOT we homeschool but often Zachary replies he goes to a private school,which is OK but then some folks will ask where.Why so many questions??????????The What Grade Are You In bothers me because WHY should we have to put a label on our children's grade level,that is one GREAT thing about homeschooling,for us that is.If you really sat in and helped teach at a local public school you will find out that NOT everyone of those students are at that level,they are NOT reading at the same level nor are they understanding their multiplication facts at the same level.This is just for the government to round up the children and put them into a little group with a name. NOT HERE...................My son has his own individual needs and he may be at one level in math but in another for reading or spelling.
When we first went to a homeschool used curriculum sale I asked a child what grade are you in and his mother simply replied we go by age and needs NOT the grade level and I said you know that makes so much sense,thanks to that unknown mother of all boys.