FWIW I asked the math program about his report card when we submitted it and told them he had achievement testing I thought was a better indicator of his math ability. The secretary told me not to worry about it, the key reason they wanted the report card was for the teacher notes/behavior/motivation portion of it.
Makes a lot of sense to me and after that interaction I think I'd be more worried about some sort of negative behavior noted on an early elementary report card, which may be observed by someone later. I think most people know the grades (unless very very bad) are really meaningless.
